25 POINTS!!!!Which of the following affects blood volume?

A. The speed at which the blood flows
B. The strength at which the heart contracts
C. The amount of water present in the blood
D. The rate at which the heart contracts

Answers

Answer 1
Answer:

Answer:

The answer is D

Explanation:

My mom is a doctor

Answer 2
Answer:

Answer:

A

Explanation:


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The __________ nervous system is responsible for our fight-or-flight response.

Answers

The Sympathetic Nervous system triggers our fight-or-flight, providing our body with a burst of energy so it can respond to any danger

The sympathetic nervous system (SNS) is responsible for our fight-or-flight response. The main function of this nervous system i to mobilise the body's fight or flight response. Action include: acceleration of the heart rate,sweating, decreasing motility of the large intestine, fast breathing, constricting blood vessels...

How does clastic sedimentary rock form

Answers

If the sediment is buried deeply, it becomes compacted and cemented, forming sedimentary rock. Clastic sedimentary rocks may have particles ranging in size from microscopic clay to huge boulders. Their names are based on their clast or grain size. The smallest grains are called clay, then silt, then sand.


6. It's believed that cardiorespiratory exercise can help prevent heart disease because A. it helps to thin the blood. B. once the body gets stronger, it no longer absorbs saturated fat. C. once a person starts exercising, he or she can eat anything. D. many studies have linked cardiorespiratory exercise to the lowering of blood pressure.

Answers

My best guess would be D. many studies have linked cardiorespiratory exercise to the lowering of blood pressure. (Many studies have also linked going vegan to the lowering of blood pressure, too :)

The most common nutrient deficiency in the world is

Answers

Iron deficiency is the most common in the world

Good aerobic endurance means good cardiovascular efficiency ? True or False

Answers

It is true that aerobic endurance is good cardiovascular efficiency.
the answer to the question would be true.

A person who suffers from AIDS and has an immune system that does not function properly is considered to have which of the following

Answers

This person is considered to be impaired. Impairment means that natural or normal functions are no longer working correctly, which then plays a role in what the person is able or not able to do. Since this person's immune system no longer functions, they are considered to be impaired.

Answer:

A

Explanation:

I hope I`m right