At the onset of exercise, heart rate initially increases due toQuestion 3Select one:a.Increased vagal nerve activityb.Increased cardiac accelerator nerve activityc.Sympathetic withdrawald.Parasympathetic withdrawal
Question
At the onset of exercise, heart rate initially increases due toQuestion 3Select one:a.Increased vagal nerve activityb.Increased cardiac accelerator nerve activityc.Sympathetic withdrawald.Parasympathetic withdrawal
Solution
The answer is d. Parasympathetic withdrawal.
Here's the step by step explanation:
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At rest, the parasympathetic nervous system (PNS) dominates over the sympathetic nervous system (SNS). The PNS helps to maintain a low heart rate.
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When exercise begins, the body needs to increase the heart rate to pump more blood (and therefore oxygen) to the muscles.
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To do this, the body reduces (or withdraws) the influence of the PNS on the heart. This is known as parasympathetic withdrawal.
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With less PNS activity, the SNS becomes more dominant, which leads to an increase in heart rate.
So, the initial increase in heart
Similar Questions
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