Question 1

Vasomotor control mechanisms influence:

Accepted Answer

A) diameter of capillaries. 
B) stroke volume. 
C) cardiac output. 
D) diameter of arterioles. 
A) diameter of capillaries. 
B) stroke volume. 
C) cardiac output. 
D) diameter of arterioles.

Question 2

Nicole records her resting heart rate at sea level. She then climbs a mountain. After reaching 18,000 feet, she stops and records her resting heart rate again. Predict what change, if any, would be observed, and then explain the mechanisms involved.

Accepted Answer

The change in resting heart rate that Ni

Question 3

The greater the cross-sectional area of a vessel, the greater the speed of the blood flow.

Accepted Answer

A) True 
 B)False

Question 4

Cardiac output is determined by the:

Accepted Answer

A) return of blood to the heart and the heart rate. 
B) strength of contraction of the left ventricle. 
C) stroke volume and heart rate. 
D) systolic discharge and stroke volume. 
A) return of blood to the heart and the heart rate. 
B) strength of contraction of the left ventricle. 
C) stroke volume and heart rate. 
D) systolic discharge and stroke volume.

Question 5

Which of the following is not a mechanism that increases blood volume and therefore venous return of blood to the heart?

Accepted Answer

A) Antidiuretic hormone 
B) Aldosterone 
C) Atrial natriuretic hormone 
D) Renin-angiotensin mechanism 
A) Antidiuretic hormone 
B) Aldosterone 
C) Atrial natriuretic hormone 
D) Renin-angiotensin mechanism

Question 6

The pulse wave is associated with left ventricular diastole.

Accepted Answer

A) True 
 B)False

Question 7

Peripheral resistance to blood flow comes about because of:

Accepted Answer

A) friction between the blood cells and vessel walls. 
B) an increase in "arteriole runoff." 
C) constriction of the veins at the end of the capillary bed. 
D) both A and C. 
A) friction between the blood cells and vessel walls. 
B) an increase in "arteriole runoff." 
C) constriction of the veins at the end of the capillary bed. 
D) both A and C.

Question 8

Explain the primary principle of circulation as related to Newton's first and second laws of motion.

Accepted Answer

The primary principle of circulation as

Question 9

Exercise has little effect on cardiac output.

Accepted Answer

A) True 
 B)False

Question 10

When the amount of blood reaching the medulla drops, the medulla stimulates vasodilation to increase the flow of blood to the brain.

Accepted Answer

A) True 
 B)False

Question 11

As arterial blood pressure decreases, the number of impulses from the carotid baroreceptors to the medulla decreases.

Accepted Answer

A) True 
 B)False

Question 12

Explain how a drop in blood protein can cause edema (the collection of fluid) in the tissues.

Accepted Answer

When there is a drop in blood protein le

Question 13

Which of the following factors increases heart rate?

Accepted Answer

A) Sudden, intense pain of visceral organs such as the intestines and the gallbladder 
B) Stimulation of skin receptors by cold 
C) Anxiety and fear 
D) Grief 
A) Sudden, intense pain of visceral organs such as the intestines and the gallbladder 
B) Stimulation of skin receptors by cold 
C) Anxiety and fear 
D) Grief

Question 14

Blood osmotic pressure and blood hydrostatic pressure are opposing forces in terms of moving fluid into and out of the circulatory system.

Accepted Answer

A) True 
 B)False

Question 15

Blood viscosity is caused by both red blood cells and the protein concentration of the blood.

Accepted Answer

A) True 
 B)False

Question 16

Because the circulatory system is a closed system filled with fluid, the pulse wave is felt at the same time in any part of the body.

Accepted Answer

A) True 
 B)False

Question 17

Based on the Starling law of the heart, the greater the venous return, the stronger the heart contraction.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following blood vessels has the largest total cross-sectional area?

Accepted Answer

A) Capillary 
B) Aorta 
C) Vena cava 
D) Arteriole 
A) Capillary 
B) Aorta 
C) Vena cava 
D) Arteriole

Question 19

Velocity of blood is relatively constant as blood flows from the aorta toward the capillaries.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following statements is true?

Accepted Answer

A) Stimulation by the vagus nerve slows the heart rate. 
B) Stimulation by the cardiac nerve slows the heart rate. 
C) Parasympathetic stimulation occurs through the cardiac nerve. 
D) Both B and C are true. 
A) Stimulation by the vagus nerve slows the heart rate. 
B) Stimulation by the cardiac nerve slows the heart rate. 
C) Parasympathetic stimulation occurs through the cardiac nerve. 
D) Both B and C are true.

Exam 30: Circulation of the Blood

Vasomotor control mechanisms influence:

Nicole records her resting heart rate at sea level. She then climbs a mountain. After reaching 18,000 feet, she stops and records her resting heart rate again. Predict what change, if any, would be observed, and then explain the mechanisms involved.

The greater the cross-sectional area of a vessel, the greater the speed of the blood flow.

Cardiac output is determined by the:

Which of the following is not a mechanism that increases blood volume and therefore venous return of blood to the heart?

The pulse wave is associated with left ventricular diastole.

Peripheral resistance to blood flow comes about because of:

Explain the primary principle of circulation as related to Newton's first and second laws of motion.

Exercise has little effect on cardiac output.

When the amount of blood reaching the medulla drops, the medulla stimulates vasodilation to increase the flow of blood to the brain.

As arterial blood pressure decreases, the number of impulses from the carotid baroreceptors to the medulla decreases.

Explain how a drop in blood protein can cause edema (the collection of fluid) in the tissues.

Which of the following factors increases heart rate?

Blood osmotic pressure and blood hydrostatic pressure are opposing forces in terms of moving fluid into and out of the circulatory system.

Blood viscosity is caused by both red blood cells and the protein concentration of the blood.

Because the circulatory system is a closed system filled with fluid, the pulse wave is felt at the same time in any part of the body.

Based on the Starling law of the heart, the greater the venous return, the stronger the heart contraction.

Which of the following blood vessels has the largest total cross-sectional area?

Velocity of blood is relatively constant as blood flows from the aorta toward the capillaries.

Which of the following statements is true?

Organization of the Body

Homeostasis

Chemistry of Life

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Cell Function

Cell Growth and Development

Introduction to Tissues

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Ventilation

Gas Exchange Transport

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Digestion and Absorption

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Fluid and Electrolyte Balance

Acid-Base Balance

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