Download Applied Exercise Physiology

Applied Exercise Physiology
KINE 4300
Practice Exam 2, Spring, 2005
True or False
1. An increase in cardiac output will decrease blood pressure when peripheral resistance is constant.
F
2. In general, heart rate increases in direct proportion to the metabolic rate during exercise. T
3. The central command theory of cardiovascular control argues that the initial signal to the
cardiovascular system at the beginning of exercise comes from higher brain centers. T
4. Stroke volume is inversely proportional to the afterload. T
5. An increase in alveolar ventilation serves to lower arterial PCO2 and increase blood pH. T
Multiple Choice
6. In order to meet the increased oxygen demands of muscle during exercise, two major adjustments
in blood flow muse be made. C
a. an increase in HR and blood pressure
b. an increase in brain blood flow and blood flow to the skin
c. an increase in cardiac output and a redistribution of blood flow from inactive tissues to
skeletal muscles
d. an increase in muscle blood flow and an increase in blood flow to the liver.
7. The three principal mechanisms for increasing venous return during exercise are B
a. an increase in stroke volume, HR, and compliance of the vascular system
b. venoconstriction, pumping action of muscle, and the pumping action of the respiratory
system.
c. an increase in vascular resistance, an increase in HR, and a decrease in blood pressure
d. none of the above are correct
8. The cardiovascular control center is located in A
a. the medulla oblongata
b. carotid sinus
c. cerebrum
d. atria of the heart
9. The increase in cardiac output that occurs during exercise is due to A
a. both an increase in mean arterial pressure and a decrease in vascular resistance
b. a decrease in vascular resistance only
c. an increase in mean arterial blood pressure only
d. an increase in heart rate and a decrease in mean arterial blood pressure
10. Most of the increase in mean arterial blood pressure that occurs during dynamic (isotonic)
incremental exercise is due to B
a. an increase in diastolic blood pressure
b. the increase in systolic blood pressure alone
c. both an increase in diastolic and systolic blood pressure
d. none of the above are correct
11. The respiratory control center is located within A
a. the medulla oblongata
b. the cerebrum
c. carotid bodies
d. cerebellum
12. The carotid bodies are chemoreceptors that are sensitive to changes in arterial B
a. H+ and K+ concentrations
b. pH, PCO2, and PO2
c. pH and K+ concentrations
d. PCO2 and pH only
13. The ventilatory central chemoreceptors respond to changes in B
a. the pH of mixed venous blood
b. the pH of cerebral spinal fluid
c. the pO2, pH, and PCO2 of cerebral spinal fluid
d. none of the above are correct
14. Ventilatory control during submaximal exercise is likely due to D
a. afferent feedback to the respiratory control center
b. efferent neural activity from higher brain centers
c. humoral (blood borne) stimuli
d. some combination of a, b, and c, is correct
15. Which of the following is true of the heart rate: A
a. parasympathetic stimulation reduces the rate of SA node action potentials
b. training enhances sympathetic innervation to the SA node at rest
c. sympathetic stimulation increases the time between atrial and ventricular systole
d. all of the above
e. a and c only
16. The relationship between cardiac output and metabolic rate is B
a. exponential
b. linear
c. curvilinear
d. none of the above are correct
17. An increase in parasympathetic outflow to the heart results in C
a. a slight decrease in arterial blood pressure followed by an increase in HR
b. an increase in HR
c. a decrease in HR
d. a slight increase in arterial blood pressure
18. The motor nerves connected to the ventilatory muscles are called A
a. somatic motor nerves
b. sciatic motor nerves
c. cardioaccelerator nerves
d. autonomic nerves
19. The nerves controlling the circulatory system may be classified as D
a. may be part of the autonomic nervous system
b. may be classified as sympathetic nerves
c. may be classified as cardioaccelerator nerves
d. all of the above
20. The nerves that innervate the smooth muscle of the blood vessels are A
a. sympathetic vasoconstrictors
b. motor end plates
c. phrenic nerves
d. the epinephrine nerve.