Chapter 84: Sports Physiology

Chapter 84: Sports Physiology

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

1. During exercise in a healthy person which of the following is TRUE?

1. The number of open vessels decreases
2. There is a pulmonary vasoconstriction due to a decrease in pO₂ in the pulmonary arterial blood
3. Blood flow is equal throughout all portions of the lung
4. V/Q ratio becomes more normal (approaches 1)

ANS: D

2. Which of the following would be expected to occur as an untrained person begins to exercise?
   1. Increased pulmonary vascular resistance
   2. Decreased cardiac output
   3. More homogenous ventilation-perfusion ratios throughout the lung
   4. Decreased diffusing capacity

ANS: C

3. During moderate aerobic exercise,
4. Arterial pO₂increases to >120 mmHg
5. Arterial pCO₂decreases
6. Arterial pH decreases
7. Alveolar ventilation increases
8. Blood lactate level increases

ANS: D

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

1. «                                «                                ¯
2. ¯                                  ­                                  ¯
3. ­                                  ­                                  ­
4. ­                                  ¯                                  ­
5. ­                                  ­                                  «
6. ­                                  ¯                                  ¯
7. ­                                  «                                ­
8. ¯                                  ¯                                  ¯

ANS: A