Question 1

Which of the following statements are true of the location and layers of the heart? (Read carefully and select all of the correct statements.)

Accepted Answer

A)  The heart is medial to the lungs and inferior to the diaphragm.
B)  The fibrous pericardium is the thickest and outermost pericardial membrane.
C)  The parietal and visceral pericardia are mucous membranes.
D)  The endocardium lines the heart and prevents friction as the heart beats.
E)  The apex of the heart is at the upper right of the mediastinum.F) The myocardium is the thickest layer of the wall of the heart and is responsible for contraction.G) Cells of the myocardium are able to generate their own action potentials.H) The units of contraction within cardiac muscle fibers are sarcomeres.I) A) and G)
J) B) and D)

Question 2

Which of the following statements are true of circulation through the heart? (Read carefully and select all of the correct statements.)

Accepted Answer

A)  The right side of the heart pumps blood to the body.
B)  The left side of the heart pumps blood to the lungs.
C)  The heart is really two pumps that work in alternating beats.
D)  If the right side pump were to stop working, the left side pump could partially compensate.
E)  None are correct.F) A) and C)
G) D) and E)

Question 3

The hormone that raises blood pressure by directly increasing the reabsorption of water by the kidneys is ____________________.

Accepted Answer

The answer of The hormone that raises blood pressure by...

Question 4

The formation of angiotensin II will:

Accepted Answer

A)  decrease venous return
B)  increase urinary output
C)  lower blood pressure
D)  raise blood pressureE) C) and D)
F) B) and D)

Question 5

In fetal circulation, most blood bypasses the fetal lungs by way of the:

Accepted Answer

A)  foramen ovale and ductus venosus
B)  ductus venosus and umbilical vein
C)  umbilical vein and ductus arteriosus
D)  ductus arteriosus and foramen ovaleE) C) and D)
F) B) and D)

Question 6

A blood pressure reading has:

Accepted Answer

A)  the systolic value first
B)  the diastolic value first
C)  either the systolic or diastolic value first, whichever is higher
D)  None of these is always true.E) A) and B)
F) None of the above

Question 7

Which of the following statements are true of the maintenance of blood pressure (BP) ? (Read carefully and select all of the correct statements.)

Accepted Answer

A)  If more blood returns to the heart, the ventricles contract more forcefully to pump it out, and this raises BP.
B)  The hormone ADH helps the kidneys conserve water and helps prevent a decrease in BP.
C)  The elasticity of the large arteries helps decrease diastolic BP.
D)  If BP decreases, filtration in the kidneys decreases.
E)  Aldosterone stimulates the reabsorption of Na+ ions by the kidneys, which lowers BP.F) If BP decreases, the kidneys secrete the enzyme renin, which stimulates the secretion of epinephrine to prevent a further decrease.G) Norepinephrine stimulates vasoconstriction in skin, viscera, and skeletal muscles, all of which lower BP.H) The hormone ANP increases the excretion of K+ ions by the kidneys, which helps conserve water and raise BP.I) B) and D)
J) B) and H)

Question 8

Blood from the digestive organs and spleen flows into the liver through the:

Accepted Answer

A)  inferior vena cava
B)  portal vein
C)  hepatic artery
D)  hepatic veinE) A) and C)
F) A) and B)

Question 9

When BP decreases, the kidneys secrete ____________________, which initiates the formation of ____________________.

Accepted Answer

rennin, an...

Question 10

Which statement is NOT true of blood vessels and blood pressure?

Accepted Answer

A)  Vasoconstriction raises BP.
B)  Norepinephrine causes vasoconstriction.
C)  The diameter of arteries and veins is regulated by the hypothalamus.
D)  Sympathetic impulses to arteries go to the smooth muscle in their walls.E) C) and D)
F) B) and D)

Question 11

The layer in the wall of an artery that prevents rupture of the artery is the:

Accepted Answer

A)  outer layer of fibrous connective tissue
B)  simple squamous epithelial lining
C)  middle layer of smooth muscle and elastic connective tissue
D)  smooth muscle liningE) B) and D)
F) A) and D)

Question 12

When vasoconstriction is needed to raise BP, the arteries receive more ____________________ impulses.

Accepted Answer

The answer of When vasoconstriction is needed to raise BP,...

Question 13

Which of the following statements are true of capillaries? (Read carefully and select all of the correct statements.)

Accepted Answer

A)  Their walls are made of simple squamous epithelium.
B)  Blood plasma in capillaries becomes tissue fluid by the process of filtration.
C)  The process of osmosis returns some tissue fluid to the blood at the venous end of capillaries.
D)  The process of filtration brings dissolved nutrients to tissues.
E)  The colloid osmotic pressure of blood is created by plasma proteins such as albumin.F) The flow of blood into a capillary network is regulated by a precapillary sphincter.G) D) and F)
H) A) and F)

Question 14

An arterial anastomosis is important because it:

Accepted Answer

A)  provides another pathway for blood to return to the heart
B)  provides another pathway for blood to leave the capillaries of an organ
C)  provides another pathway for blood to get to the capillaries of an organ
D)  exchanges materials between blood and tissuesE) B) and D)
F) All of the above

Question 15

Angiotensin II causes ____________________ and stimulates the secretion of ____________________, both of which will ____________________ BP.

Accepted Answer

vasoconstriction, al...

Question 16

The flow of blood into a capillary network is regulated by a ____________________, which is made of ____________________ tissue.

Accepted Answer

precapillary sphinct...

Question 17

During exercise, blood flow to the digestive tract will:

Accepted Answer

A)  increase
B)  decrease
C)  remain the same
D)  be unpredictableE) A) and B)
F) B) and C)

Question 18

Two hormones that affect blood pressure because they affect the diameter of blood vessels are ____________________ and ____________________.

Accepted Answer

epinephrine, norepinephrine
no...

Question 19

To compensate for a small loss of blood, the heart rate will ____________________.

Accepted Answer

The answer of To compensate for a small loss of...

Question 20

The purpose of hepatic portal circulation is to enable the liver to:

Accepted Answer

A)  regulate blood pressure by increasing it
B)  remove waste products from the blood and excrete them in urine
C)  increase venous return to the heart
D)  regulate blood levels of nutrients and other substancesE) None of the above
F) A) and B)

Exam 13: The Vascular System

Two hormones that affect blood pressure because they affect the diameter of blood vessels are ____________________ and ____________________.

Correct Answerverifiedepinephrine, norepinephrineno...View AnswerShow Answer

The purpose of hepatic portal circulation is to enable the liver to:

Correct AnswerverifiedShow Answer

Angiotensin II causes ____________________ and stimulates the secretion of ____________________, both of which will ____________________ BP.

Correct Answerverifiedvasoconstriction, al...View AnswerShow Answer

Which of the following statements are true of the maintenance of blood pressure (BP) ? (Read carefully and select all of the correct statements.)

Correct AnswerverifiedShow Answer

When BP decreases, the kidneys secrete ____________________, which initiates the formation of ____________________.

Correct Answerverifiedrennin, an...View AnswerShow Answer

A blood pressure reading has:

Correct AnswerverifiedShow Answer

Which of the following statements are true of the location and layers of the heart? (Read carefully and select all of the correct statements.)

Correct AnswerverifiedShow Answer

The layer in the wall of an artery that prevents rupture of the artery is the:

Correct AnswerverifiedShow Answer

The hormone that raises blood pressure by directly increasing the reabsorption of water by the kidneys is ____________________.

Correct AnswerverifiedShow Answer

To compensate for a small loss of blood, the heart rate will ____________________.

Correct AnswerverifiedShow Answer

Which of the following statements are true of circulation through the heart? (Read carefully and select all of the correct statements.)

Correct AnswerverifiedShow Answer

The formation of angiotensin II will:

Correct AnswerverifiedShow Answer

When vasoconstriction is needed to raise BP, the arteries receive more ____________________ impulses.

Correct AnswerverifiedShow Answer

In fetal circulation, most blood bypasses the fetal lungs by way of the:

Correct AnswerverifiedShow Answer

During exercise, blood flow to the digestive tract will:

Correct AnswerverifiedShow Answer

An arterial anastomosis is important because it:

Correct AnswerverifiedShow Answer

The flow of blood into a capillary network is regulated by a ____________________, which is made of ____________________ tissue.

Correct Answerverifiedprecapillary sphinct...View AnswerShow Answer

Which statement is NOT true of blood vessels and blood pressure?

Correct AnswerverifiedShow Answer

Blood from the digestive organs and spleen flows into the liver through the:

Correct AnswerverifiedShow Answer

Which of the following statements are true of capillaries? (Read carefully and select all of the correct statements.)

Correct AnswerverifiedShow Answer

Two hormones that affect blood pressure because they affect the diameter of blood vessels are and .

Correct Answer
verified
epinephrine, norepinephrine
no...
View Answer

Correct Answer
verified

Angiotensin II causes and stimulates the secretion of , both of which will BP.

Correct Answer
verified
vasoconstriction, al...
View Answer

Correct Answer
verified

When BP decreases, the kidneys secrete , which initiates the formation of .

Correct Answer
verified
rennin, an...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The flow of blood into a capillary network is regulated by a , which is made of tissue.

Correct Answer
verified
precapillary sphinct...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified