Review Questions

DIRECTIONS: Each of the numbered items or incomplete statements in this section is followed by answers or by completions of the statement. Select the ONE lettered answer or completion that is BEST in each case.

1. Mean arterial pressure equals

(A) Arterial compliance times stroke volume

(B) Heart rate times stroke volume

(C) Cardiac output times systemic vascular resistance

(D) Cardiac output times arterial compliance

2. Mean arterial pressure changes if

(A) Heart rate increases, with no changes in cardiac output or systemic vascular resistance

(B) Stroke volume changes, with no changes in heart rate or systemic vascular resistance

(C) Arterial compliance changes, with no changes in cardiac output or systemic vascular resistance

(D) Heart rate doubles and systemic vascular resistance is halved, with no change in stroke volume

(E) Arterial compliance doubles and systemic vascular resistance is halved, with no change in heart rate

3. Blood pressure measured using a sphygmomanometer

(A) May be falsely low with too narrow a cuff

(B) May be falsely low in patients with badly stiffened arteries

(C) May be falsely high in obese patients

(D) Gives a direct reading of mean arterial pressure

(E) Depends on the disappearance of sound to signal systolic pressure

4. In the systemic circulation, vascular resistance

(continued)

(A) Changes occur mainly in the aorta and large arteries

(B) Is altered more by changes in blood viscosity than radius

(C) Is altered more by changes in vessel radius than length

(D) Is altered more by changes in vessel length than radius

5. Standing up causes

(A) Decreased diameter of leg veins

(B) Decreased blood volume within the cranium

(C) Increased stroke volume

(D) Increased right atrial volume

(E) Decreased central blood volume

6. If a person has an arterial blood pressure of 125/75 mm Hg,

(A) The pulse pressure is 40 mm Hg

(B) The mean arterial pressure is 92 mm Hg

(C) Diastolic pressure is 80 mm Hg

(D) Systolic pressure is 120 mm Hg

(E) The mean arterial pressure is 100 mm Hg

7. A person with an arterial blood pressure of 150/90 mm Hg and a right atrial pressure of 3 mm Hg develops an incompetent tricuspid valve, and right atrial pressure rises to 13 mm Hg with no change in arterial pressure. The pressure gradient forcing blood through the systemic circulation

(A) Is unchanged

(B) Decreased from 107 to 97 mm Hg

(C) Increased from 103 to 113 mm Hg

(D) Decreased from 147 to 137 mm Hg

(E) Increased from 93 to 103 mm Hg

8. If mean arterial pressure increases (due to an increase in systemic vascular resistance) and stroke volume and heart rate remain constant, the pulse pressure

(A) Increases

(B) Decreases

(C) Does not change

9. If the compliance of veins were equal to that of arteries, the change in central blood volume with standing would be

(A) Less than normal

(B) Greater than normal

(C) The same as normal

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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Responses

  • linda
    What is the mean arterial pressure of a patient with a blood pressure of 150/90 mm hg?
    8 years ago

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