Question 1

The greatest resistance to blood flow occurs in the:

Accepted Answer

A)  arteries. 
B)  arterioles. 
C)  venules. 
D)  capillaries. 
A)  arteries. 
B)  arterioles. 
C)  venules. 
D)  capillaries.

Question 2

The blood-pumping action of respirations and skeletal muscle contractions are both important factors promoting the return of venous blood to the heart.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following events would tend to cause a decrease in blood viscosity?

Accepted Answer

A)  An increase in red blood cell count 
B)  Marked anemia 
C)  An increase in blood protein concentration 
D)  Both A and C 
A)  An increase in red blood cell count 
B)  Marked anemia 
C)  An increase in blood protein concentration 
D)  Both A and C

Question 4

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 5

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 6

The blood in the subclavian vein of the chest had a P1 of 15 mm Hg. For the blood to flow back to the heart, the P2 in the superior vena cava:

Accepted Answer

A)  would have to be greater than 25. 
B)  would have to be between 15 and 25. 
C)  would have to be less than 15. 
D)  could be at any value. 
A)  would have to be greater than 25. 
B)  would have to be between 15 and 25. 
C)  would have to be less than 15. 
D)  could be at any value.

Question 7

Blood vessels can hold much more blood than is present in the body.

Accepted Answer

A) True 
 B)False

Question 8

Which artery in the arm is used for measuring blood pressure?

Accepted Answer

A)  Brachial 
B)  Radial 
C)  Ulnar 
D)  Axillary 
A)  Brachial 
B)  Radial 
C)  Ulnar 
D)  Axillary

Question 9

Because of their small diameter, capillaries account for almost all the resistance to blood flow in the circulatory system.

Accepted Answer

A) True 
 B)False

Question 10

Blood in the veins of which organ is not considered part of the "blood reservoir" system?

Accepted Answer

A)  Skin 
B)  Skeletal muscle 
C)  Spleen 
D)  Liver 
A)  Skin 
B)  Skeletal muscle 
C)  Spleen 
D)  Liver

Question 11

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 12

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 13

What are two functions that circulation control mechanisms must accomplish?

Accepted Answer

Circulation control mechanisms within th

Question 14

List two factors that affect peripheral resistance. Explain how these factors influence arterial blood pressure. In normal blood flow, where is the major peripheral resistance encountered?

Accepted Answer

Two factors that affect peripheral resis

Question 15

The pulse wave is associated with left ventricular diastole.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following statements is true regarding local control of arterioles?

Accepted Answer

A)  Local vasodilation is also referred to as active hyperemia. 
B)  Nitric oxide causes vasoconstriction. 
C)  Endothelin causes vasodilation. 
D)  All of the above statements are true regarding local control of arterioles. 
A)  Local vasodilation is also referred to as active hyperemia. 
B)  Nitric oxide causes vasoconstriction. 
C)  Endothelin causes vasodilation. 
D)  All of the above statements are true regarding local control of arterioles.

Question 17

Because of the high concentration of protein in plasma, a decrease in the red blood cell count will cause an increase in blood viscosity.

Accepted Answer

A) True 
 B)False

Question 18

The atrial natriuretic hormone mechanism promotes water retention, thus increasing total plasma volume.

Accepted Answer

A) True 
 B)False

Question 19

List two major factors that promote the return of venous blood to the heart. Explain how each facilitates venous return.

Accepted Answer

Two major factors that promote the retur

Question 20

Two important baroreceptors are located in the aorta and the carotid artery.

Accepted Answer

A) True 
 B)False

Exam 30: Circulation of the Blood

The greatest resistance to blood flow occurs in the:

The blood-pumping action of respirations and skeletal muscle contractions are both important factors promoting the return of venous blood to the heart.

Which of the following events would tend to cause a decrease in blood viscosity?

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

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

The blood in the subclavian vein of the chest had a P1 of 15 mm Hg. For the blood to flow back to the heart, the P2 in the superior vena cava:

Blood vessels can hold much more blood than is present in the body.

Which artery in the arm is used for measuring blood pressure?

Because of their small diameter, capillaries account for almost all the resistance to blood flow in the circulatory system.

Blood in the veins of which organ is not considered part of the "blood reservoir" system?

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.

Which of the following factors increases heart rate?

What are two functions that circulation control mechanisms must accomplish?

List two factors that affect peripheral resistance. Explain how these factors influence arterial blood pressure. In normal blood flow, where is the major peripheral resistance encountered?

The pulse wave is associated with left ventricular diastole.

Which of the following statements is true regarding local control of arterioles?

Because of the high concentration of protein in plasma, a decrease in the red blood cell count will cause an increase in blood viscosity.

The atrial natriuretic hormone mechanism promotes water retention, thus increasing total plasma volume.

List two major factors that promote the return of venous blood to the heart. Explain how each facilitates venous return.

Two important baroreceptors are located in the aorta and the carotid artery.

Organization of the Body

Homeostasis

Chemical Basis of Life

Biomolecules

Cell Structure

Cell Function

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Muscle Contraction

Nervous System Cells

Nerve Signaling

Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

General Senses

Special Senses

Endocrine Regulation

Endocrine Glands

Blood

Heart

Blood Vessels

Lymphatic System

Innate Immunity

Adaptive Immunity

Stress

Respiratory Tract

Ventilation

Gas Exchange & Transport

Upper Digestive Tract

Lower Digestive Tract

Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid Base Balance

Male Reproductive System

Female Reproductive System

Growth and Development

Genetics and Heredity

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