Need help with this answer please 4. During a routine checkup, Wade is diagnosed

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Need help with this answer please

4. During a routine checkup, Wade is diagnosed with mild hypertension. Wade is of normal weight, he has an office job (requiring long periods of sitting down at a desk), and he rarely exercises. The doctor prescribes a minimum of 30 minutes of moderate exercise (such as a brisk walk) each day. Wade exclaims, "But Doc! I am not fat! How would exercise help me? Wouldn't a pill be more effective?" Explain how mild hypertension affects cardiac output. Be sure to explain the effect on both heart rate and stroke volume (be specific). (4 pts.) a.

Explanation / Answer

The cardiac output equals the heart rate (HR), which is the number of heartbeats per minute, and the stroke volume (SV) that is the volume of blood pumped by the ventricles with each heartbeat. If our body needs more blood, then our heart will increase the cardiac output. This increased cardiac output is produced by the both increased heart rate and increased stroke volume. Mild hypertension has increased cardiac output and normal peripheral resistance. Hypertension is dangerous because it makes the heart work harder to pump blood out to the body and contributes to hardening of the arteries, or atherosclerosis, stroke, and heart failure. Exercise can increase the heart beats and more blood is pumped out with each beat. These factors both contribute to a rise in BP as well as cardiac output.

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