040-444

040-444 practice questions, page 15 of 15, with answer review and explanations.

Question 71

The remains relatively unchanged throughout childhood. However, after age 25, it typically decreases by __________.

  1. 0% to 5% each decade.
  2. 5% to 15% each decade.
  3. 15% to 20% each decade.
  4. 15% to 20% each year.

Question 72

Cardiac output is a function of heart rate and stroke volume. In children, why is heart rate higher at rest and during exercise?

  1. Because in children, stroke volume is directly related to how much left ventricular stiffness reduces diastolic filling.
  2. Because in children, cardiac output is regulated more by peripheral resistance than V02 max by any other variable.
  3. Because children typically have a lower stroke volume compared to adults.
  4. Because children typically have a more elevated peripheral resistance compared to adults.

Question 73

The increases as a result of physical training in elderly persons. This occurs for all of the following reasons EXCEPT __________.

  1. In men, the increase is a function of improved central and peripheral adaptations.
  2. In women, the increase is a function of improved peripheral adaptations.
  3. In both men and women, regular aerobic exercise slows the decline with aging.
  4. In both men and women, regular aerobic exercise speeds the decline with aging.