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HMS, BM EQ-Bank 357 MC

During a 30 minute jog, a student recorded an increase in their cardiac output. This change is primarily due to:

  1. Decreased blood pressure
  2. Increased respiratory rate
  3. Increased heart rate and stroke volume
  4. Decreased peripheral resistance
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\(C\)

Show Worked Solution

Consider Option C: Increased heart rate and stroke volume

  • Cardiac output increases during aerobic exercise due to both increased heart rate and stroke volume.

Other Options:

  • A is incorrect: Blood pressure typically increases (not decreases) during exercise.
  • B is incorrect: Respiratory rate increases but doesn’t directly cause cardiac output increase.
  • D is incorrect: Peripheral resistance decreases but isn’t the primary cause of increased cardiac output.

\(\Rightarrow C\)