Answer:
Moving things in and out of the cell is an important role of the plasma membrane. It controls everything that enters and leaves the cell. There are two basic ways that substances can cross the plasma membrane: passive transport, which requires no energy; and active transport, which requires energy.Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis )
Explanation:
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During physiology class, the instructor asks students to explain the pathology behind development of multiple sclerosis. Which student gave the most accurate description
The most accurate description is option (A) i.e, The demyelination and subsequent degeneration of nerve fibers and decreased oligodendrocytes, which interfere with nerve conduction.
What is multiple sclerosis?A condition where the immune system destroys the nerves' protective covering.
Multiple sclerosis doesn't have a known etiology. A body's immune system attacking its own tissues is regarded as an autoimmune disease. The fatty substance known as myelin, which covers and shields the nerve fibers in the brain and spinal cord, is destroyed in Multiple sclerosis, which has four stages:
solitary clinical syndrome (CIS)Remitting-relapsing MS (RRMS)MS with secondary progression (SPMS)MS with primary progression (PPMS)Common signs of multiple sclerosis (MS) include:
vision problems.tingling and numbness.pains and spasms.weakness or fatigue.balance problems or dizziness.bladder issues.sexual dysfunction.cognitive problems.To know more about multiple sclerosis refer to: https://brainly.com/question/11122101
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The complete question is:
During physiology class, the instructor asks students to explain the pathology behind development of multiple sclerosis. Which student gave the most accurate description?
A)The demyelination and subsequent degeneration of nerve fibers and decreased oligodendrocytes, which interfere with nerve conduction
B)Muscle necrosis with resultant increase in fat/connective tissue replacing the muscle fibers
C)Atherosclerotic destruction of circulation to the brain resulting in lactic acid buildup that affects nerve transmission
D)Autoimmune disease where antibody loss of acetylcholine receptors at the neuromuscular junction causes decrease motor response
Single Strand Binding Proteins are responsible for:
A. linking the short sections of the lagging side.
B. unwinding and separating the DNA strands.
C. keeping the strands separated during replication.
D. adding the new bases.
Answer:
C. keeping the strands separated during replication.
I think
Explanation:
suppose some hypothetical disease prevented the formation of astrocytes in the fetal brain. How would you expect this to affect brain development
The framework for nerve tissue is created by astrocytes. They create the blood-brain barrier, which separates the blood from the brain tissue and restricts the substances that can reach the neurons, safeguarding them. The neuron is fed by them. They alter blood flow to the brain to accommodate shifting nutrition and oxygen requirements. encourage the development of synapses and new neuron proliferation. They affect the way that neurons communicate. The neurotransmitters are released. Neurons create scar tissue and fill the void when they are imaged.
What are astrocytes?A subtype of glial cells in the central nervous system is called an astrocyte. Additionally called astrocytic glial cells. Their many processes surround the star-shaped synapses created by neurons. A single astrocyte cell in a human can communicate with up to 2 million synapses at once.
In addition to controlling blood flow, astrocytes also deliver mitochondria to neurons and the raw materials for neurotransmitters, which power neuronal metabolism. Furthermore, astrocytes have the capacity to phagocytose synapses, modify neurotrophin secretion, and remove debris.
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You are a prestigious scientist working in a lab whose most recent project includes the creation of a series of drugs that will hopefully cure breast cancer. Since this drug is in its early stages, you are not able to test it on humans. You test this drug on a cell culture and find that it destroys the mitochondria within the cell. Which aspect of cellular metabolism would this drug interfere with
This drug destroys the mitochondria within the cell. Hence, this drug will interfere with the citric acid cycle and electron transport system of cellular metabolism.
The Krebs cycle, also known as the TCA cycle or the citric acid cycle, is a series of enzyme-catalyzed reactions that take place in the mitochondrial matrix and involve the oxidation of acetyl-CoA to produce carbon dioxide and the reduction of coenzymes to produce ATP for the electron transport chain.The electron transport system is made up of a group of proteins that are affixed to the inner mitochondrial membrane and organic molecules that allow electrons to pass through and release energy through a series of redox processes. The protein ATP-synthase uses the energy liberated to create a proton gradient, which is then utilized in chemiosmosis to produce a significant amount of ATP.Hence, these processes occur in the inner mitochondrial membrane, thus the drug will interfere with the citric acid cycle and electron transport system.
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This drug destroys the mitochondria within the cell. Hence, this drug will interfere with the citric acid cycle and electron transport system of cellular metabolism.
What is the Krebs cycle?
The Krebs cycle sometimes referred to as the TCA cycle or the citric acid cycle, is a chain of enzyme-catalyzed processes that happens in the mitochondrial matrix and involves oxidizing acetyl-CoA to make carbon dioxide and reducing coenzymes to produce ATP for the electron transport chain.
The organic molecules that make up the electron transport system allow electrons to travel through and release energy through a series of redox events. These organic molecules are attached to the inner mitochondrial membrane by a set of proteins.
The energy released by the protein ATP-synthase is used to build a proton gradient, which is then used in chemiosmosis to generate a considerable amount of ATP.
As these processes take place in the inner mitochondrial membrane, the medication will interfere with the citric acid cycle and the electron transport system.
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When there is not enough carbon dioxide in a plant, a process called photorespiration may occur. This process uses the excess oxygen in the plant, uses energy, and prevents the Calvin cycle from occurring. How would a prolonged period of photorespiration affect a plant?
- A pex honors bio
A prolonged period of photorespiration would affect a plant, giving a significant evolutionary advantage to plant species in dry climates.
What is the difference between photorespiration and respiration?One of the basic differences between photorespiration and respiration concerns the effect of O2 on the two processes. Respiration saturates when O2 reaches approximately 2%, while photorespiration does not reach saturation in a pure O2 atmosphere.
Under what conditions does photorespiration occur?Photorespiration is an expensive metabolic pathway that occurs when the Calvin Cycle enzyme rubisco acts on oxygen instead of carbon dioxide.
With this information, we can conclude that A prolonged period of photorespiration would affect a plant, giving a significant evolutionary advantage to plant species in dry climates.
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To begin, morphological similarities existing among groups of species support evolution. When different organisms exhibit the same characteristics, or ____________ , they are often from the same ancestral line
To begin, morphological similarities existing among groups of species support evolution. When different organisms exhibit the same characteristics or convergent evolution, they are often from the same ancestral line.
Morphological evidence makes use of the form and structure of organisms (morphology), where homologous structures discuss the inherited frame parts that came from a common ancestor which have been modified in another way into distinct traces of descent. Thus, they are more intently related.
Morphological traits are beneficial for tracing the evolutionary relationships with a group of organisms due to the fact they can be discovered and measured in fossils in addition to in dwelling organisms.
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The prefrontal cortex Group of answer choices is the single largest area in the human brain. is twice as large as in chimpanzees. is involved in planning and decision making. All of the above.
The prefrontal cortex is involved in planning and decision making.
The cerebral cortex that covers the front portion of the frontal lobe is called the prefrontal cortex (PFC). This part of the brain has been linked to complex cognitive planning, personality expression, making decisions, and controlling social conduct.The executive function is the prefrontal cortex's most significant function. Making decisions is one of the most significant executive processes that the prefrontal cortex participates in. Recent research employing fMRI have demonstrated that the prefrontal cortex participates in decision-making under free-choice situations, despite the fact that the prefrontal contribution to decision-making has been studied using a range of behavioral tasks.Understanding the brain mechanisms behind free-choice decision-making is crucial because it is the very first stage of all decision-making processes.learn more about prefrontal cortex here: https://brainly.com/question/12612764
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Each breed of dog is known to be susceptible to certain illnesses, such as heart problems, eye disorders, or thyroid problems. Often, dog breeders will go to great lengths to breed a dog that's unrelated to a dog they want to breed. This is because
Dog breeders make great efforts to breed dogs that are unrelated to the dog they are trying to breed. This is because closely related individuals are likely to share the same harmful gene.
Breeding is the intentional collection of dogs during the breeding season to allow the animals to mate and give birth. Do not underestimate the variety.
Most breeders recommend waiting for dogs to breed until they are at least 18 months old. Most strains are fully grown at this point, limiting the potential for complications. However, many very small varieties can grow after a year.
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The main difference between meiosis I and meiosis II is that _____ in meiosis II.
A. no new DNA is created
B. cytokinesis is not involved
C. no spindle fibers form
D. the nuclei do not divide
Answer:
A
Explanation:
What makes water cold
Answer:
The temperature of the water approaches the temperature of it's surroundings as heat is transferred from the warmer object (either the air or the water) to the colder.
Explanation:
Answer:
so when whater is not in the heat waves the whater will turn cold
What key structure of the brain is involved in reward, motivation, and addiction?.
Answer:
Frontal lobes
Explanation:
The key structure of the brain that is involved in reward, motivation, and addiction is ventral tegmental area. The correct option is D.
The VTA is a part of the midbrain that is important to the reward system in the brain. It has dopamine-producing neurons that send signals to the prefrontal cortex and nucleus accumbens, among other parts of the brain.
Dopamine is released once the VTA is activated, which results in sensations of pleasure, motivation, and reinforcement.
Addiction can result from dysregulation of the reward pathways in the VTA because substances or actions that cause the release of dopamine in the VTA can strongly motivate usage or engagement even in the face of negative effects.
Thus, the correct option is D.
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Your question seems incomplete, the probable complete question is:
What key structure of the brain is involved in reward, motivation, and addiction?.
a) Cerebellum
b) Hippocampus
c) Prefrontal cortex
d) Ventral tegmental area (VTA)
why is food chewed in the mouth
Answer:
The simple act of chewing food in your mouth helps to break down larger particles of food into smaller particles.This helps to reduce stress on the esophagus and thereby helps the stomach metabolize your food.Chewing your food properly can help in the smooth digestion and nutrient absorption.Explanation:
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Explain the difference between cancerous and non-cancerous cells and how the
growth of cancerous cells would impact the healthy tissues surrounding them.
Complete the sentence: Due to _________, some people need to limit their exposure to pollen because it aggravates their respiratory systems.
Some people must restrict their pollen interaction owing to hereditary causes since it irritates their respiratory mechanism.
What is Pollen allergy?Pollen is amongst the most prevalent periodic allergy triggers. Pollen allergy is commonly referred to as "hay fever" by several individuals. Pollen allergy is commonly referred to as "seasonal allergic rhinitis" by specialists.AllergyAllergy symptoms can affect the lungs by causing asthma, allergic bronchitis, as well as other lung issues. Pollen is produced by plants throughout the spring, summer, and early fall. Pollen inhalation might induce allergic responses that harm the lungs.Learn more about universal donors here:
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What is the best example of Environmental Variation?
A. Blood group
B. Number of limbs
C. Jacket color
D. Organism size
What is the best example of Environmental Variation?
=A. Blood group
Answer:
D. Organism size
Explanation:
Took the test
Which group of plant-like protists would have organisms that are multicellular?
Answer:
Algae
Explanation:
The diagram shows four possible
genetic arrangements of a cell that
contains two chromosomes during
metaphase.
Part A:
What is the diagram MOST LIKELY
demonstrating?
A. Mutation
B. Crossing over
C. Independent assortment
Independent assortment shows four possible genetic arrangements of a cell that contains two chromosomes during metaphase.
What is independent assortment?According to the Principle of Independent Assortment, as reproductive cells mature, various genes separately segregate from one another. Gregor Mendel made the initial discovery of an independent assortment of genes and the qualities they influence in 1865 while doing genetic research on pea plants.
The image missing in the independent assortment is attached here:
By passing one copy of each diploid pair of homologous chromosomes into each gamete independently of the other pairs, according to the laws of chance, random combinations of chromosomes and genes are formed during meiosis on various pairs of homologous chromosomes.
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4. When and where would you expect to find the highest rate of primary productivity?
• A. In the polar regions during the summer months
• B. In the polar regions during the fall
O C. In the tropics during the fall
O D. In the temperate regions during the summer months
It is expected to find the highest rate of primary productivity in the tropics during the fall (Option C).
What is primary productivity?The expression 'primary productivity' makes reference to the amount of biomass produced in an ecosystem by producer autotrophic photosynthetic organisms such as plants.
Primary productivity largely depends on the process of photosynthesis by which producers can generate carbohydrates by means of solar radiation.
The measure of primary productivity of a particular ecosystem is defined by the amount of energy that is transformed by photoautotrophic organisms such as plants and algae.
In conclusion, it is expected to find the highest rate of primary productivity in the tropics during the fall (Option C).
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DISCUSS the flow of energy from producer through top carnivores in a food web in terms of the laws of thermodynamics.
Answer:
1st law of thermodynamics- energy can not be created or destroyed
2nd law of thermodynamics- energy becomes less useable
-only ten percent of energy in the producer level can be transferred to the next level and so onto the next level
- the lost energy either becomes heat or waste
According to the principle of independent assortment, there is a _____ percent chance that any tall pea plant will produce either yellow or green peas.
According to the principle of independent assortment, there is a 50 percent chance that any tall pea plant will produce either yellow or green peas.
State law of independent assortment.The Law of Independent Assortment states that Separate traits' alleles are transferred from parents to children separately from one another.
Example: Mendelian dihybrid cross.
Basic principles of genetics
Principles of Paired FactorsPrinciple of DominanceLaw of Segregation or Law of Purity of Gametes (Mendel's First Law of Inheritance)Law of Independent Assortment (Mendel's Second Law of Inheritance).Learn more about law of independent assortment here:
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Which of the following is a possible undesirable result of embryonic stem cell research?
A. Creating new tissues for burn victims
B. Human cloning
C. Making organs available for transplantation
D. None of the choices
Human cloning might be a possible undesirable result of embryonic stem cell research (Option B).
What is human cloning?Human cloning refers to the molecular biology techniques aimed at generating genetically identical human beings.
Human cloning might involve human stem cells to generate new genetically identical human embryos and therefore it might be a subject of concern.
In conclusion, human cloning is an undesirable result of embryonic stem cell research (Option B).
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The primate emphasis on the visual sense is reflected in Group of answer choices the reduction in the size of structures related to the sense of smell. a more forward facing position of the eyes relative to most other mammals. the presence of color vision in most species. all of the above
The primate emphasis on the visual sense is reflected in D)all of the above.
i)The presence of color vision in most species.
Good vision is a hallmark of the primate order. Maximum primates typically have shade vison which may be dichromatic and others trichromatic. they've binocular imaginative and prescient and ahead-dealing with closely spaced eyes that permit overlap between the visual view of every eye. This gives them a stereoscopic imaginative and prescient and a good feel of depth notion.
ii)A more forward-facing position of the eyes relative to other mammals.
Any photograph formed inside the retina of the attention is despatched as electric signals via the optic nerve to the visible centers in each of the hemispheres of the mind, which in the end technique the image and allow us to peer.
iii )The reduction of the size of structures related to the sense of smell.
Even though the imaginative and prescient of the primates is enormously advanced, they have shortened muzzles and hence a discounted experience of scent.
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An experimental disinfectant has a phenol coefficient of 5 against E. coli. What is the most accurate interpretation of this data
The Interpretation shows that the disinfectant is more stronger towards the E.coli in its irradiation than to the Phenol.
Disinfectants:
It is a solution used to irradiate the pathogens like- bacteria, endospores, fungi etc. It is used as a disinfection method. All the disinfectants have a small amount of phenol as it is having antimicrobial and antifungal properties. Which when used kills or inhibits the growth of the pathogens. The small concentration of the phenol in the disinfectant is known as the Phenol coefficient.
Phenol coefficient = dilution ratio of disinfectant ÷ dilution ratio of phenol
The phenol coefficient of any pathogen can be determined by phenol coefficient tests. There are two phenol coefficient tests used-
Rideal walker method and Chick Martin test.
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A/An ____________________ is a radiographic study of the kidneys and ureters with the use of an intravenous contrast medium.
A Intravenous pyelogram is a radiographic study of the kidneys and ureters with the use of an intravenous contrast medium.
What is radiographic study?By taking pictures of the body's internal structure and analyzing them for signs of disease, foreign objects, structural damage, or anomalies, it can be used to diagnose or treat patients. A radiographic procedure involves passing an x-ray beam through the body.
What is intravenous contrast medium?One kind of contrast media is intravenous contrast material, sometimes known as IV contrast in CT. These are a sizable set of chemical preparations created to help characterize pathology by enhancing an imaging modality's capacity to distinguish between various biological tissues.
What is the purpose of a radiology test?Diagnostic imaging, or radiology, is the term for a group of procedures that include taking photos or images of various bodily parts.
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formulate a theory about one aspect of human development and a hypothesis that relates to it
A theory is that human species is evolutionary linked to apes and one hypothesis may be the association of this process with certain homologous structures.
What is the evolution theory?The evolutionary theory is a scientific theory that explains how organisms evolve from a common ancestor.
This theory can be used to explain the presence of homologous strictures between humans and primate during embryonic development, which may be verified by establishing hypotheses that can be confirmed by experimental procedures.
In conclusion, a theory about one aspect of human development is we are evolutionary linked to apes and one hypothesis is it is associated with certain homologous structures.
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Find the missing links, respectively
Answer:
C, CO2 --> CO2
Explanation:
Plants --> Oxygen (O2) --> Animals --> Carbon-dioxide (CO2) --> Plants
Plants absorb carbon dioxide which is used in the process of photosynthesis to make food. The plants respire (breathe out/exhale) oxygen, which is taken in by animals such as humans (us), and then use it for respiring or breathing. We breathe out carbon dioxide, which is then used to continue the cycle.
This is the reason why cutting down plants and trees are harmful for the environment; it reduces the number of trees and plants that can reduce the CO2 in our atmosphere.
How would you expect the rate of meat digestion to differ in an animal whose digestive tract had less of the enzyme pepsin?
Answer:
Digestion occurs when the animal’s body gets busy breaking down the food. Two types of digestion exist in all animals: Mechanical digestion physically breaks down food into smaller and smaller pieces.
(d) Other than the shape and presence of haemoglobin, state one more adaptation of a normal red blood cell. Explain how the adaptation helps the red blood cell to perform its function. ( d ) Other than the shape and presence of haemoglobin , state one more adaptation of a normal red blood cell . Explain how the adaptation helps the red blood cell to perform its function .
The adaptations of the red blood cells for this function include:
have thin membranes which enables easy diffusionsmall and flexible structure enabling them to travel through capillaries.What are some adaptations of red blood cells help it transport oxygen in oxygen and carbon dioxide transfer?Red blood cells are primarily responsible for delivering oxygen to cells and tissues as well as the removal pf carbon dioxide as waste from the tissues and cells.
The adaptations of the red blood cells for this function include:
possess thin membranes which enables easy diffusionthey are small and flexible enabling them to travel through capillaries.Therefore, red blood cells possess adaptation which enables them to transport gases efficiently to and from the tissues.
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Under ideal conditions, a human can detect a candle flame 30 miles away on a clear night. t f
Answer:
The answer is true
Explanation:
Heredity and punnet squares
Section
1: Overview of Lab
1. What is the purpose of the lab?
we're science experiments took place