Hall: Guyton and Hall Textbook of Medical Physiology, 12th Edition
Chapter 84: Sports Physiology
Test Bank
1. During exercise in a healthy person which of the following is TRUE?
A. The number of open vessels decreases
B. There is a pulmonary vasoconstriction due to a decrease in pO2 in the pulmonary
arterial blood
C. Blood flow is equal throughout all portions of the lung
D. V/Q ratio becomes more normal (approaches 1)
2. Which of the following would be expected to occur as an untrained person begins to
exercise?
A. Increased pulmonary vascular resistance
B. Decreased cardiac output
C. More homogenous ventilation-perfusion ratios throughout the lung
D. Decreased diffusing capacity
3. During moderate aerobic exercise,
A. Arterial pO2 increases to >120 mmHg
B. Arterial pCO2 decreases
C. Arterial pH decreases
D. Alveolar ventilation increases
E. Blood lactate level increases
4. A 25-year-old female is comfortably running a 10 km race. At eight km, which of the
following would describe her blood composition.
Arterial pO2 Arterial pCO2 Mixed Venous pO2
A.
B.
C.
D.
E.
F.
G.
H.
Test Bank
84-2
020 40 60 80 100
5
10
15
0
20
PO2
Content
ml O2/dl
A
B
C
D
E
020 40 60 80 100
5
10
15
0
20
PO2
Content
ml O2/dl
A
B
C
D
E
Figure 1
5. Which of the following is most likely to occur in a strenuously exercising person?
A. Decreased arterial hemoglobin saturation
B. Venous hemoglobin saturation of less than 30%
C. Increased pulmonary capillary transit time
D. Pulmonary vasoconstriction due to hypoxia
Use the two figures to pick which points answer the following question. Please read the
figures carefully.
6. In an exercising person:
Arterial Blood Venous Blood
A. Figure 1 point C Figure 2 point A
B. Figure 1 point C Figure 2 point B
C. Figure 1 point D Figure 2 point C
D. Figure 1 point D Figure 2 point B
E. Figure 1 point E Figure 2 point C
F. Figure 1 point E Figure 2 point B
7. A 52-year-old male runner is trying to fight old age and increase his aerobic performance
in the marathon. Which of the following would help the most?
A. Sodium bicarbonate
B. Amphetamines
C. Anabolic steroids
D. Erythropoietin
O2 Saturation
020 40 60 80 100
25
50
75
0
100
PO2
A
B
C
D
E
O2 Saturation
020 40 60 80 100
25
50
75
0
100
PO2
A
B
C
D
E
020 40 60 80 100
25
50
75
0
100
PO2
A
B
C
D
E
Figure 2
8. Which of the following occurs during exercise at aerobic levels?
A. Decreased arterial pO2
B. Increased alveolar pO2
C. Normal alveolar-arterial pO2 gradient
D. Decreased alveolar-arterial pO2 gradient
9. A 46-year-old female is completing her exercise test. Which of the following will occur?
A. All areas of her lung will have the same blood flow
B. The upper portion of the lung will have more flow than the lower portion
C. The lower portion of the lung will have more flow than the upper portion
D. Hypoxic vasoconstriction limits the maximal oxygen consumption
10. During muscular exercise:
A. The stimulus for the increased ventilation originates from chemoreceptors in the lung.
B. Pulmonary vascular resistance increases
C. Muscle proprioreceptors provide a stimulus to increase ventilation
D. Ventilation increases are delayed following the increase in metabolic rate
11. Following the completion of an 80 mile bicycle race which of the following would
replenish muscle glycogen the fastest?
A. No food intake
B. Sweet and sour pork
C. Fried catfish
D. Pasta
E. Steak