An infant weighing 2300g would be considered a ___-birthweight infant.

MBCD is made up of molecules of the kind of carbohydrates. A cyclic oligosaccharide, methyl-cyclodextrin (MBCD), is one of them. Option D is Correct.

MBCD, or methyl-cyclodextrin, is made up of carbohydrates. Given that it is a cyclic oligosaccharide, the glucose molecules that make up the compound are arranged in a ring configuration. The word "cyclodextrin" in the name alludes to the ring structure, while the word "oligosaccharide" indicates that it is composed of a few sugar molecules.

Fatty acids and carbohydrates don't contain nitrogen; amino acids do. Proteins are made up of amino acids, which provide the body energy; fatty acids and carbohydrates do not. A glycerol molecule is joined to three fatty acids in a dehydration synthesis step to form triglycerides. Option D is Correct.

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The main component of the cytosol is water.

It makes up about 70% of the cytosol, which is the fluid-like substance that fills the cell and surrounds the organelles.

Water is essential for many cellular processes, such as the transport of molecules and the maintenance of the cell's shape.

Other important components of the cytosol include ions, small molecules like sugars and amino acids, and proteins.

While the nucleus is a vital organelle that contains the cell's genetic material, it is not a component of the cytosol.

The organelles, such as mitochondria and ribosomes, are suspended in the cytosol and perform specific functions within the cell.

Overall, the cytosol is a dynamic and complex environment that is critical for the proper functioning of cells.

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An acute infection of the throat that can lead to swelling and closure of the glottis and cause suffocation is known as epiglottitis.

Epiglottitis is a serious condition that occurs when the epiglottis, a flap of tissue at the base of the tongue that prevents food from entering the windpipe during swallowing, becomes inflamed and swelling occurs in this region. This can lead to a narrowing or closure of the airway, making it difficult to breathe.

Epiglottitis is usually caused by a bacterial infection, most commonly Haemophilus influenzae type b (Hib) in children, but can also be caused by other bacteria or viruses.

Symptoms of epiglottitis include high fever, severe sore throat, difficulty swallowing, drooling, and a muffled or hoarse voice. If left untreated, epiglottitis can lead to respiratory failure and death. Treatment typically involves hospitalization, airway support, antibiotics, and anti-inflammatory medications. Vaccination against Hib is recommended as a preventative measure against epiglottitis in children.

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DNA repair is a complex process that involves a set of proteins that are always active and can involve the excision of bases flanking a distortion in the helix.

This process can prevent errors in DNA replication and fix chromosomal inversions and translocations. However, it is important to note that DNA repair is not always active during DNA replication, and there are times when the DNA may be more susceptible to damage. During the process of DNA repair, the damaged DNA is recognized by proteins that can then recruit other proteins to the site of the damage. These proteins then work together to excise the damaged portion of the DNA and replace it with a new, undamaged segment. This process is essential for maintaining the integrity of the genome and preventing mutations that can lead to diseases like cancer.

In conclusion, DNA repair is a crucial process that is always active and can involve the excision of bases flanking a distortion in the helix. It can prevent errors, fix chromosomal inversions and translocations, and involves a set of proteins that work together to maintain the integrity of the genome. While it may not always be active during DNA replication, it is essential for preventing mutations and ensuring the proper functioning of cells.

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In order to heat the Earth's surface and atmosphere and contribute to long-term climate change, greenhouse gases are described as gases that absorb and then release radiant energy.

In the Earth's atmosphere, water vapour, methane, ozone, carbon dioxide, and nitrous oxide are the most common greenhouse gases.

When deforestation is done, it causes green house gases to increase

The primary component of greenhouse gases is CO2.

1. Animals on earth use oxygen and release CO2, and plant life takes CO2 as a substate for photosynthesis, reducing, CO2 levels.

2. Green house gas increases and tree carbon converts to CO2 when tree are burnt.

The main harmful effects of increasing green house gases are climate change.

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The partial pressure of oxygen at the peak of Mount Everest can be calculated using the fact that the concentration of oxygen in the air remains constant, but the total air pressure decreases with altitude. The partial pressure of oxygen at the peak of Mount Everest will be option C, 0.07 atm.

Since the total air pressure at the peak of Mount Everest is about one-third of that at sea level, the partial pressure of oxygen can be calculated as follows:

The partial pressure of oxygen = Concentration of oxygen x Total air pressure

The concentration of oxygen in the air is 0.21, which means that it makes up 21% of the total air volume. Therefore, the partial pressure of oxygen at the peak of Mount Everest can be calculated as:

Partial pressure of oxygen = 0.21 x (1/3 atm) = 0.07 atm

Therefore, the correct answer is option C) 0.07 atm. This low partial pressure of oxygen at high altitudes can cause altitude sickness and make it difficult for humans to breathe without supplemental oxygen.

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In order to have a complete protein from plants, it is recommended to consume complementary proteins at the same time. This means pairing two plant sources together that provide all essential amino acids, which are the building blocks of protein.

One example of complementary proteins that provide a complete protein is rice and beans. Rice is low in the amino acid lysine but high in methionine, while beans are low in methionine but high in lysine. By consuming rice and beans together, we get a complete protein that provides all essential amino acids.

Another example of complementary proteins is hummus and whole wheat pita. Hummus is made from chickpeas, which are high in lysine but low in methionine, while whole wheat pita is low in lysine but high in methionine. By consuming hummus and whole wheat pita together, we get a complete protein that provides all essential amino acids.

It is important to note that while complementary proteins can provide a complete protein, it is not always necessary to consume them at the same time. As long as we consume a variety of plant-based protein sources throughout the day, we can still get all the essential amino acids our body needs.

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Answer: Taxonomical classification

Explanation: This is the most reliable because, all living organisms needed to be classified in groups to find out their similarities and  differences.

The information obtained from tagged marine mammal populations can be useful in their management and conservation by providing insights into their behavior, movements, and habitat use.

This information can be used to identify critical habitats and migration routes, assess the impact of human activities on these populations, and design effective conservation strategies. For example, data from tagged marine mammals can help identify areas where they are most vulnerable to entanglement in fishing gear or collisions with ships, and inform the development of mitigation measures.

Tagging data can also help assess the effectiveness of marine protected areas in providing important habitat for these populations. Overall, the information obtained from tagged marine mammal populations can provide crucial insights that enable effective management and conservation of these charismatic and ecologically important species.

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Gel electrophoresis is a powerful tool for separating and analyzing DNA fragments, and it has numerous applications in fields such as genetics, forensics, and biotechnology.

Restriction fragments of DNA can be separated from one another through a process called gel electrophoresis. This technique is commonly used in molecular biology to separate and visualize DNA fragments of different sizes.

Gel electrophoresis involves placing the DNA fragments into a gel matrix, which is then subjected to an electric field. The gel acts as a sieve, allowing smaller fragments to migrate faster through the matrix than larger fragments. The DNA fragments are negatively charged due to the phosphate groups in their backbone, and therefore they are attracted toward the positively charged electrode at the opposite end of the gel.

As the DNA fragments migrate through the gel, they form distinct bands based on their size, which can be visualized by staining the gel with a dye such as ethidium bromide. These bands can then be compared to a DNA ladder or size marker, which consists of fragments of known sizes, in order to determine the size of the unknown DNA fragments.

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When a diploid cell undergoes meiosis, the result is four haploid cells. During meiosis, the diploid cell undergoes two rounds of cell division, resulting in four daughter cells.

Each daughter cell contains only half the number of chromosomes as the original diploid cell. The first round of meiosis separates the homologous chromosomes, and the second round separates the sister chromatids, resulting in the formation of four genetically unique haploid cells. These haploid cells can then go on to fuse with another haploid cell during fertilization, restoring the diploid number of chromosomes in the resulting zygote. Meiosis is essential for sexual reproduction and genetic diversity.

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The correct option is A. Commensalism, the relationship that exists between golden jackals and tigers, where the jackals trail species and eat their leftovers, is an example of commensalism.

Commensalism also exists in the connection between tigers and golden jackals. The jackal warns the tiger of a slaughter and eats on the tiger's leftover prey. As the tiger does not provide anything to the jackal, this is not a mutualistic connection.

They can appear in a variety of forms, such as commensalism and parasitism (when one species benefits while the other suffers) (where one species benefits and the other is neither harmed nor helped).

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Answer:

it is tissue

Explanation:

the level of organization is

organel, cell, tissue, organ, organ system and organism so the collection of simillar cell is tissue

A group of similar cells that function together are known as tissues so Xavier is observing the structure of a tissue. Option D is correct.

A group of cells that perform similar functions are referred to as the tissues. All tissues are formed from a group of similar cells. The tissues are classified into four major categories. These categories are- epithelial, connective, muscle, and nervous tissues.

The tissues that are present on the external body surfaces are known as epithelial tissues. The tissues that connect the different cells and organs of the body are known as the connective tissues. The tissues that help in the movement are muscle tissues. The nerve tissues help in the generation of electrical signals and their propagation in the form of nerve impulses.

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I can give you a general explanation of the terms you've mentioned. A "tissue" is a group of similar cells that work together to perform a specific function in the body.

There are four main types of tissues: epithelial, connective, muscle, and nervous. Each type has various subtypes based on their unique functions and locations.

A "cell" is the smallest structural and functional unit of an organism, and it is the building block of tissues. Different types of cells have different functions, and their specific roles determine the type of tissue they form.

A "subtype" refers to a more specific classification within a general category, such as a specific kind of tissue within one of the main tissue types.

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If a septic tank is pumped in a wet period the tank may float out of the ground, option C.

A drainfield (also known as a soil absorption field) plus a septic tank make up a conventional septic system.

In the septic tank, sediments and floatable debris (such oils and grease) are separated from the wastewater while organic matter is broken down. In traditional or soil-based systems, the fluid, sometimes referred to as effluent, is released from the septic tank into a network of perforated pipes buried in a leach field, chambers or other specialised units intended to gradually release the effluent into the soil. The drainfield is the name of this region.

Alternative methods remove or neutralise pollutants including microorganisms that cause illness, nitrogen, phosphorus, and other contaminants by allowing septic tank effluent to flow through sand, organic matter (like peat and sawdust), created wetlands, or other media with the use of pumps or gravity.

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The thirteen vitamins essential to humans fall into two groups based on whether they are soluble in fat or water.

What are the vitamins?

Vitamins are organic compounds that are essential for normal growth and functioning of the body. There are 13 vitamins that are considered essential for humans, which are:

Vitamin A (retinol)

Vitamin B1 (thiamine)

Vitamin B2 (riboflavin)

Vitamin B3 (niacin)

Vitamin B5 (pantothenic acid)

Vitamin B6 (pyridoxine)

Vitamin B7 (biotin)

Vitamin B9 (folic acid)

Vitamin B12 (cobalamin)

Vitamin C (ascorbic acid)

Vitamin D (calciferol)

Vitamin E (tocopherol)

Vitamin K (phylloquinone)

The four fat-soluble vitamins are vitamins A, D, E, and K, while the nine water-soluble vitamins are the eight B vitamins (B1, B2, B3, B5, B6, B7, B9, B12) and vitamin C.

What is folic acid?

Folic acid is a synthetic form of folate, which is a B vitamin. It plays an important role in DNA synthesis and repair, cell division, and the production of red blood cells. Folic acid is commonly found in fortified foods such as cereals, bread, and pasta, as well as in dietary supplements. It is especially important for pregnant women to get enough folic acid to prevent birth defects in the baby's brain and spine.

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Complete question is: The thirteen vitamins essential to humans fall into two groups based on whether they are soluble in fat or water.

Amphibians and non-avian reptiles have incompletely divided ventricles. Therefore the correct option is option A.

Amphibians and most non-avian reptiles have a partially divided ventricle, which means that oxygenated and deoxygenated blood mingle to some extent. This is due to the fact that their ventricle is divided by a partial septum that does not entirely separate the two sides of the heart.

Mammals and birds, on the other hand, have totally divided ventricles with a full septum that divides oxygenated and deoxygenated blood. Fish, crustaceans, and insects all have extremely distinct circulatory systems. Crustaceans have an open circulatory system, while insects have a tubular heart that pumps hemolymph across their body cavity.

Therefore the correct option is option A.

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The chemicals that are used to reduce the amount of toxic chemical entering water systems are called coagulators. The chemical coagulators bind with the toxic matter and remove them from water.

The chemical coagulators preferably used for water treatment are of two types. They are chelating salts, and organic polymer coagulants. The chelating salts usually has an iron, or aluminum group to it, whereas the organic polymers can be polyamines, melamine formaldehydes, and ash based organic compounds.

Hence, based on the above-mentioned statement, it can be concluded that coagulators are the chemical solutions that help to reduce toxic matter from entering the water systems.

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For a sequence of DNA of ~200 kb, a BAC vector would be appropriate, as it can accommodate such a size and is easier to manipulate than YACs. However, the choice of vector ultimately depends on the specific needs of the project.

Cloning large sequences of DNA can be challenging, but there are a few vectors that can be used for this purpose. One option is bacterial artificial chromosomes (BACs), which are large plasmids that can accommodate inserts up to 300 kb in size. BACs are particularly useful for cloning large genomic regions, as they can be propagated in bacteria and can also be used for functional studies in transgenic animals.

Another option is yeast artificial chromosomes (YACs), which are larger than BACs and can accommodate inserts up to 2 Mb in size. YACs are particularly useful for studying large chromosomal regions and can also be used for gene therapy and other applications.

Both BACs and YACs require specialized techniques and protocols for their preparation and manipulation, as well as for the screening and analysis of their clones. Therefore, the choice of vector will depend on the specific requirements of the project, including the size and complexity of the DNA sequence to be cloned, the downstream applications of the clones, and the resources available for their preparation and analysis.

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The peak seasons for rats to breed in temperate zones are spring and fall. Therefore the correct option is option A.

Rats are known for their ability to reproduce rapidly and adapt to changing environmental conditions. Rat breeding seasons in temperate zones are spring and autumn.

In temperate zones, where the climate is characterized by distinct seasons, rats tend to breed most frequently in the spring and fall, when food and shelter are plentiful and temperatures are moderate.

During these seasons, rats can produce multiple litters of offspring, which can quickly lead to population explosions if left unchecked.  Therefore the correct option is option A.

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It is true that Natural selection is a process in which individuals that have certain heritable characteristics survive and reproduce at a higher rate than other individuals.

Natural selection is a fundamental mechanism of evolution that occurs when individuals with certain advantageous traits are better able to survive and reproduce in their environment than those without those traits. Over time, this results in the accumulation of beneficial traits within a population and the removal of disadvantageous traits.

The key factors involved in natural selection are variation, heritability, differential survival, and differential reproduction. First, there must be genetic variation within a population, meaning that individuals must differ in their traits. Second, those traits must be heritable, meaning that they can be passed down from one generation to the next. Third, some individuals must be better adapted to their environment and have a higher chance of survival than others. Finally, those individuals with advantageous traits must also have a higher chance of reproducing and passing on those traits to their offspring.

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A. True. During transcription of a specific gene, only one DNA strand serves as a template for the formation of RNA.

During transcription, only one of the two DNA strands, the template strand, is used as a template for RNA synthesis. The other strand, the non-template strand or sense strand, is not used for RNA synthesis but has the same sequence as the RNA transcript, except for thymine (T) which is replaced by uracil (U) in RNA. Transcription, the genetic information stored in DNA is transferred to RNA.

This process occurs in the nucleus of eukaryotic cells and involves several steps, including initiation, elongation, and termination. To initiate transcription, RNA polymerase, the enzyme responsible for synthesizing RNA, binds to a specific region of DNA called the promoter. Once bound, the enzyme unwinds the double-stranded DNA, separating the two strands and exposing the template strand.

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The most effective and commonly used isolation technique for the majority of applications and colony isolation in the laboratory is the "streak plate method."

The streak plate method involves spreading a bacterial sample across the surface of a solid agar medium using an inoculating loop.

This technique allows for the separation of individual bacterial cells, enabling them to grow into distinct colonies.

The process typically involves streaking the loop through the sample, then spreading it over a section of the agar plate in a pattern.

The loop is sterilized and then streaked through the initial section, dragging bacteria into a second section of the plate. This process is repeated a few times, ultimately diluting the bacterial concentration and promoting the formation of isolated colonies.

For most laboratory applications, the streak plate method is the preferred isolation technique due to its simplicity, effectiveness, and ability to produce isolated colonies from a mixed bacterial population.

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Schwann cells produce a myelin sheath around a portion of just one axon, but oligodendrocytes can surround a segment of multiple axons.So, choice d is the right one.

Any of the peripheral nervous system's cells that create the myelin sheath that envelops neuronal axons are known as Schwann cells, also known as neurilemma cells.

Theodor Schwann, a German biologist, is remembered as the person who first identified Schwann cells in the 19th century.

These cells are comparable to an oligodendrocyte-class of neuroglia found in the brain and spinal cord.Oligodendrocytes do not produce myelin; only Schwann cells do.

During embryonic development, Schwann cells diverge from neural crest cells, and they are prompted to multiply.

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Schwann cells differ from oligodendrocytes in which of the following ways?

a) Schwann cells form myelin; oligodendrocytes do not.

b) Oligodendrocytes are only found in the PNS; Schwann cells are only found in the CNS.

c) Schwann cells form sheaths around several axons, while oligodendrocytes form sheaths around only one axon.

d) Schwann cells form a myelin sheath around a portion of only one axon, while oligodendrocytes can surround portions of several axons.

None of the above.

A child who supports curfew argues that it is important for their safety and well-being, as parents are responsible for protecting them from nighttime dangers and ensuring they get enough sleep. They believe a compromise between parents and children is the best solution to the curfew problem, as it can lead to less conflict and more acceptance of the curfew.

As a child, I believe that having a curfew is important for my safety and well-being. Parents are responsible for ensuring that their children are protected from night time dangers, such as car accidents and careless drivers.

According to the National Sleep Foundation, children my age need ten to eleven hours of sleep each night to stay alert during school and other activities. By having a curfew, my parents can help me get enough sleep and stay safe at the same time.

While some children may argue that their parents are not respecting their ability to make good decisions, I think that having a curfew is a way for parents to show they care about their children's safety and well-being. It's important for parents to listen to their children's opinions and involve them in making decisions about curfews.

Ultimately, I believe that a compromise between parents and children is the best solution to the curfew problem. If parents insist on a curfew, then involving their children in the decision-making process can lead to less conflict and more acceptance of the curfew.

By working together, parents and children can find a curfew that works for everyone.

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The visceral reflexes that do not involve the central nervous system (CNS) but instead synapse in the sympathetic ganglia are called autonomic reflex arcs. These reflex arcs involve the autonomic nervous system (ANS), which is responsible for regulating and maintaining the body's internal environment.

Autonomic reflex arcs are initiated by sensory receptors located in the viscera or organs of the body. These receptors detect changes in the internal environment, such as changes in blood pressure or pH levels, and transmit signals to the autonomic ganglia, which are clusters of nerve cell bodies located outside the CNS. The autonomic ganglia contain synapses between preganglionic neurons, which originate in the CNS, and postganglionic neurons, which innervate the target organs.

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An individual that inherits two different alleles for the same trait is said to be heterozygous for that trait. The correct answer is option b.

A trait has two alleles, one is the dominant allele (denoted by capital letter) and the other is recessive allele (denoted by small letter).

When an individual inherits two same copies of the allele, whether both dominant or both recessive, such an individual is referred to as homozygous dominant or homozygous recessive for that trait.

An individual who is heterozygous for that trait has one dominant allele and the other recessive allele. In such a case, the dominant allele masks the phenotypic expression of the recessive allele.

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The temperature and humidity of the environment can also affect the death rate of microbes. Higher temperatures and lower humidity can lead to quicker destruction of microorganisms, while lower temperatures and higher humidity can slow down the process.

Additionally, the presence of organic matter or other substances in the environment can also impact the effectiveness of disinfection or sterilization methods.

1. The concentration of microbes
- A higher concentration of contaminants takes longer to destroy, as it requires more time and effort to reduce the population to a safe level.

2. The diversity of the microorganisms in the population
- The target population is usually a mixture of bacteria, fungi, spores, and viruses. The more diverse the population, the more complex it becomes to eliminate or control all the different types of microorganisms.

3. The temperature and humidity of the environment
- These factors can affect the death rate of microorganisms, as some may thrive in specific conditions while others may struggle to survive. Adjusting temperature and humidity can be used to control the growth and survival of certain microorganisms.

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Blood returns from the lungs to the heart through pulmonary veins and it returns to the heart from the rest of the body through the aorta. The correct answer is D) pulmonary veins; aorta.

These veins are responsible for carrying oxygenated blood from the lungs to the heart. Once the blood has been oxygenated in the lungs, it is returned to the left atrium of the heart through the pulmonary veins. From there, it flows into the left ventricle and is then pumped out of the heart through the aorta.

On the other hand, blood returns to the heart from the rest of the body through the venae cavae. These veins are responsible for carrying deoxygenated blood from the body back to the heart. The superior vena cava brings blood from the upper half of the body, while the inferior vena cava brings blood from the lower half of the body.

Once the deoxygenated blood is in the right atrium, it flows into the right ventricle and is then pumped out of the heart through the pulmonary artery to be oxygenated in the lungs.

It is important to understand the pathways of blood flow in the body as they play a crucial role in maintaining proper circulation and oxygenation of the tissues. Any disruptions in this flow can lead to serious health problems such as heart disease, stroke, and pulmonary embolism.

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The Extensor Hallucis Longus is a muscle located in the lower leg that extends from the lateral condyle of the tibia to the base of the distal phalanx of the big toe. It is responsible for extending the big toe and dorsiflexing the foot.

The muscle is innervated by the deep peroneal nerve, which also supplies other muscles in the lower leg. The insertion of the Extensor Hallucis Longus muscle is through the tendon that runs along the top of the foot and inserts into the base of the distal phalanx of the big toe.

On the anterior surface of the fibula, medial to the extensor digitorum longus muscle, the extensor hallucis longus muscle originates for around the middle two-fourths of the fibula's length. Similar to the leg's interosseous membrane, it also partially arises from there.

It is situated between the tibialis anterior and the anterior tibial vessels and deep fibular nerve.

The fibres travel downward and terminate in a tendon, which occupies the anterior border of the muscle, travels through a specific compartment in the cruciate crural ligament, crosses from the medial to the lateral side of the anterior tibial vessels close to the ankle's bend, and is inserted into the base of the great toe's distal phalanx.

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