PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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intrinsic cardiac regulation of pumping response to changes in vol of blood flowing into the heart
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control of heart rate and strength of heart pumping by the ANS
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all of the above
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none of the above
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Detailed explanation-1: -There are two primary modes by which the blood volume pumped by the heart, at any given moment, is regulated: 1) intrinsic cardiac regulation, in response to changes in the volume of blood flowing into the heart; and 2) control of heart rate and cardiac contractility by the autonomic nervous system.
Detailed explanation-2: -The definition of stroke volume is the volume of blood pumped out of the left ventricle of the heart during each systolic cardiac contraction.
Detailed explanation-3: -It’s different for different people, depending on their size. Usually, an adult heart pumps about 5 liters of blood per minute at rest. But when you run or exercise, your heart may pump 3-4 times that much to make sure your body gets enough oxygen and fuel.