1. Explain how the heart could compensate for changes in peripheral resistance.
ID: 3523629 • Letter: 1
Question
1. Explain how the heart could compensate for changes in peripheral resistance.
2. Which mechanism had the greatest compensatory effect? How well did the results compare to your prediction?
3. Explain what happened when the pump pressure and the beaker pressure were the same. How well did the results compare with your prediction?
4. Explain whether it would be better to adjust heart rate or blood vessel diameter to achieve blood flow changes at the local level ( for example in the digestive system).
Explanation / Answer
1. The heart can compensate for changes in peripheral resistance by decreasing blood viscosity. It causes an increase in heart rate and increased contractility also.
2. Decreasing the pressure in the destination beaker had the greatest compensatory effect this causes decrease pressure and afterload.
3. When the pump pressure and the beaker pressure were the same,there will be no flow because the valve would not open due to insufficient driving pressure to force fluid out of the pump.
4. It would be better to adjust the blood vessel diameter to achieve blood flow changes at the local level because such adjustments to blood vessel diameter can be made at the local level because the effects will only occur locally. If the heart rate was adjusted it could change the blood flow to the entire body.
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