Five students design an experiment to answer the question:"how is heart rate affected by running?''Two chairs were set up at different ends of a large room.The pulse rate of each student was taken at rest just before running?"Each of the five students ran between the chairs a different number of times.Their pulse rates were taken after running and the results are shown in the table below.If a control group is not included in an experiment, it would be difficult to

Answers

Answer 1

Answer:

Without a control group, it is difficult to determine the effect of running on heart rate, as there may be other factors influencing the results. To accurately determine the effect of running on heart rate, it would be helpful to include a control group of individuals who do not run and to control for other variables that could potentially affect heart rate.

Explanation:

determine if the changes in heart rate were due to running or some other factor. A control group is a group of individuals or objects that serve as a reference point for comparison in an experiment. It helps to isolate the effect of the variable being tested (in this case, running) and helps to rule out the influence of other variables that could potentially affect the outcome.

Without a control group, it would be difficult to determine if the changes in heart rate were due solely to running or if there were other factors at play. For example, perhaps one of the students was feeling particularly anxious or stressed before running, which could have affected their heart rate. Or perhaps the room temperature or humidity were different for each student, which could also impact heart rate.

To improve the design of this experiment, it would be useful to include a control group of students who did not run at all. This would allow for a more accurate comparison of the effect of running on heart rate, as any changes in the control group could be attributed to factors other than running. It would also be helpful to control for other variables, such as room temperature and humidity, to further isolate the effect of running on heart rate.


Related Questions

Use the Pedigree Chart to answer the following question





What does the white square represent in a Pedigree?

Answers

Answer:

A family tree

Explanation:

or a choose female or even a male

Answer:

A white square is a non-carrier/unaffected male

Explanation:

Which will diffuse easily in the cell membrane: Molecules that are lipids or molecules that are ionic (charged).

Answers

Answer: Molecules that are lipid soluble because the cell membrane is a phospholipid bilayer.

Explanation:

A. GUC
B. CGU
C. UCG
D. UGU

Answers

Answer:

A

Explanation:

it'll go GUC➡️CAG➡️GUC

what did Rosalind franklin discover about DNA

Answers

That DNA was made up of two chains of nucleotide pairs that encode the genetic information of all living things

difene the meaning of the phrase entry requirements to higher education institutions and state four reasons why knowing the entry requirements is important​

Answers

Answer:

1. Entry requirements to higher education are the necessary and important criteria that students intending to acquire higher education must attain before they can be granted admission.

2. Four reasons why knowing the entry requirement is important include;

a. It helps the students chose the right courses in high school.

b. It provides a standard for the universities to evaluate students objectively.

c. It ensures the admittance of students to courses suited for their capabilities and strengths.

d. It prepares students for the tasking academic environment by ensuring that they have a background knowledge of their chosen course.

Explanation:

Before students can be granted admission into schools chosen by them, they must meet certain standards to be deemed qualified by the admitting institution. Knowing these standards on time gives the students a sense of purpose and helps them to develop skills and abilities that make them qualified for admission into these schools.

It also helps the university choose the right students for different courses. Studying ahead to have the required certificates for admission helps the student gain background knowledge of their future course.

PLZZ HALP Put the following terms in order from the most specific to the broadest (1-9).....


Organelle....Organ....Macromolecule....Atom....Organism....Cell....Organ system....Molecule....Tissue

Answers

Answer:

molecule → macromolecule → organelle → cell → tissue → organ → organ system → whole organism.

Explanation:

hi..................

Answers

Answer:

Hi! Before I go tell me what you think of this meme I made:

Explanation:

hello free points?.......

Beginning with the flow phase arrange biochemical process in order menstrual cycle

Answers

Answer:

1.  The endometrial lining breaks down and low levels of estrogen stimulate the pituitary to release FSH and LH

2. FSH and LH stimulate the follicles to develop and the oocyte to produce estrogen.

3. Rising estrogen levels suppress FSH production and development of other follicles.

4. A spike in LH causes the follicle to rupture

5. High progesterone levels maintain the endometrial lining of the uterus.

6. A breakdown of corpus luteum causes progesterone levels to drop.

Explanation:

Answer for Plato, got it right.

Explain the role of both biotic and abiotic factors within a nutrient cycle.

Answers

Answer:

Answer. Biotic factors are the living things in an ecosystem so they do not recycle. Abiotic factors are the different physical and chemical components available like temperature, air, water, minerals, rocks,and PH. Not ll of them are recycled.

The role of both factors within a nutrient cycle is very important  because nutrients cycling through biotic and abiotic systems constantly.

Explain the role of both biotic and abiotic factors within a nutrient cycle?

Plants, animals, microorganism and organic matter are the biotic locations of nutrients while on the other hand, the atmosphere, water, and soil represent the abiotic locations. Nutrients are constantly moving or cycling through biotic and abiotic systems.

So we can conclude that the role of both factors within a nutrient cycle is very important  because nutrients cycling through biotic and abiotic systems constantly.

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If the individuals at Level IV - 1 and 2 had offspring, what do we know
could happen?

Answers

Answer:

all their kids might have the disease

Explanation:

if you do a Punnett square for the gene Xx X for female and X Y for male, then there is a 50 percent chance their kids would have the disease

2. What is made inside of bones that is carried throughout the circulatory system?

Answers

Answer:

oxygen, calcium or iron

Answer:

Bone Marrow

Explanation:

The inside of your bones is filled with a soft tissue called marrow. There are two types of bone marrow: red and yellow. Redbone marrow is where all new red blood cells, white blood cells, and platelets are made.

A.Bacteria and mold
B. deer
C.grasses
D.mountain lion
Please help

Answers

Either A or C I believe

Which of the following best describes a process by which metamorphic rock becomes igneous rock

A.weathering into sediments, then eroding
B.compacting under pressure and cementing
C.changing shape under heat and pressure
D.melting completely, then cooling

Answers

Answer: D. Melting completely, then cooling

Metamorphic rock melt, become magma (which is really just lava), and then comes to the Earth’s surface to eventually cool and become igneous rocks.

*PLEASE ANSWERR!!*
What is the second step in fieldwork for marine science?

a.) presentation

b.) analysis

c.) collection

Answers

Answer:

its b

Explanation:

I hope this help

Mmm

Sides of a DNA molecule are made up of sugar molecules alternating with phosphate molecules true or false

Answers

yes the statement is absolutely correct

Why do the planets and other celestial objects in our solar system revolve around the Sun?

Answers

Answer:

The Sun's great mass and gravitational pull

Explanation:

What phrase from the selection helps you understand the meaning of “composes”?

Answers

Please mark me brainliest!

It would be D (made of)

Hope this helps!

Describe the flow of energy to the lion using a food chain from the food web that includes a rabbit.​

Answers

Answer:

10%

Explanation:

the sun gives energy to the grass (to make it easier to understand, say the sun gives 100un of energy to the plants)

from there, the rabbit eats the grass( 10% of 100 is 10, so the rabbit gets 10un of energy)

and the, a lion eats the rabbit (10% of 10 is 1, so the lion gets 1 un of energy)

every single time a predator consumes prey, it only gets 10% of what the prey gets from its prey.

Hope this helps :)

HELP!!!! 50PTS!!!!! WILL BE MARKED BRAINLIEST!!!!

Adaptive radiation is often seen after which of the following events? (4 points)
Mass extinctions
Sexual selection
Genetic drift
Founder effect I think is A

Answers

Answer:

genetic drift I'm pretty sure

Explanation:

have an amazing day!!!!!!!

Answer:

mass extinctions

Explanation:

I NEED HELP ASAP DUE IN 10 MINUTES
The herbivores in the forest don’t consume this low-growing invasive plant because they mistake it for a similarly shaped toxic plant in the forest. The invasive plant needs a lot of room to grow. It sprouts from its seeds much earlier than the native species. What effect can its growth have on the native herbivores’ food supply?

Answers

Answer:

It could grow at such an extrem erate that it could use up all natural resources that the native species needs to survive. thus breeding out all native species and becoming a invasive species. The native species the animals eat now does not exist and the animals that needed that food will decrease drastically in populus.

Explanation:

state two features in the nephron that facilitate ultrafiltration​

Answers

Answer:

The glomerulus is a knot of cappilaries inside the Bowman's capsule. ... Podocytes are cells that have 'foot-like extensions' which are wrapped around a capillary. This increases the surface area for filtration.

Explanation:

Select the correct answer.
Which device is using a motor?
A. a water heater creates heat energy from electric energy
B.A waterfall rotates a waterwheel to turn an axel
C. A body massager uses electric energy to move back and found
B. A solar charger creates electric energy from the sun

Answers

I think answer should be b. Please give me brainlest let me know if it’s correct or not okay thanks bye

what ways do we use patterns of classification in science? give examples

Answers

Answer:

Classification is the way scientists use to categorize and organize all of life. It can help to distinguish how similar or different living organisms are to each other

Explanation:

Patterns are used in science to classify objects or phenomena into groups. There are patterns of both similarity and difference.

What is classification?

Classification is the way scientists use to group and categorize objects, phenomenon or life forms. It can help to distinguish how similar or different living organisms are to each other based upon the pattern of their structure and organization.

Patterns are regular and intelligible forms , sequences, or structure that  found throughout nature. Scientific questions may be generated when scientists observe a pattern of events or when something does not match an established pattern.

For example, the frozen water in an iceberg is arranged into a regular, repeating crystal structure—a pattern of similarity. Young children can observe a common pattern of difference, the differences between adult animals and their offspring.

Thus, it is clear from above explanation,  the ways to use patterns of classification in science.

Learn more about, classification, here;

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The reticular formation ________.
A) sets the rate of respiratory movements
B) contains nuclei and centers that regulate vital autonomic nervous system functions
C) relays somatic information to the ventral posterior nuclei of the thalamus
D) regulates heart rate and force of contraction, and distribution of blood flow
E) relays information from the spinal cord, the red nuclei, other midbrain centers, and the cerebral cortex to the vermis of the cerebellum

Answers

Answer:

B) contains nuclei and centers that regulate vital autonomic nervous system functions

Explanation:

The correct option is - B) contains nuclei and centers that regulate vital autonomic nervous system functions

Reason -

The reticular formation contains nuclei and centers that regulate vital autonomic nervous system functions.

A short true-breeding plant will always produce a short plant.
True or false

Answers

Answer: false

Explanation:

What is the relationship between photosynthesis and respiration?
A Photosynthesis produces water, while respiration does not. .
B. Respiration requires sunlight, while photosynthesis does not.
C. Photosynthesis produces oxygen, and oxygen is required for respiration
D. Respiration produces glucose, and glucose is required for photosynthesis iser​

Answers

Answer:

c.

Explanation:

That be your answer mate.

Answer:

the correct answer is c

Explanation:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

Why do the noble gases NOT form compounds readily?
Group of answer choices

They have an empty outer shell

They have a full valence shell

They have 7 valence electrons

They have no electrons

Answers

it's bc they have a full valence shell

A competitive inhibitor binds ___, whereas an uncompetitive inhibitor binds ___. Please choose the correct answer from the following choices, and then select the submit answer button. Answer choices only to the enzyme; only to the enzyme-substrate complex to either the enzyme or the enzyme-substrate complex; only to the enzyme-substrate complex only to the enzyme; to either the enzyme or the enzyme-substrate complex only to the enzyme-substrate complex; only to the enzyme

Answers

Answer:

Option A, only to the enzyme; only to the enzyme-substrate complex

Explanation:

In un competitive inhibition, the inhibitor binds to an allosteric site of a enzyme which is usually present at the enzymes substrate complex.  

While in competitive inhibition, an inhibitor binds to the enzyme at its active site and hence restricts the substrate from binding

Hence, option A is correct

Which of these is NOT a reason why biodiversity is important?

a
Many species around act as a pest control.
b
There are too many animal species in the world causing competition.
c
Biodiversity loss would decrease water quality and available nutrition.
d
Biodiversity ensures food security by supplying a wide variety of plants and animal species for nutrients.

Answers

Answer:

i think the answer is d maybe

When it is summer in the southern hemisphere, what season is it in the northern hemisphere

A. Fall
B. Winter
C. Spring
D. Summer​

Answers

Answer:

Winter

Explanation:

Answer:

Winter

Explanation:

Just took the quiz

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