SCIENCE
CIRCULATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -When you are exercising, your muscles need extra oxygen-some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse.
Detailed explanation-2: -Generally speaking, your heart beats both faster and stronger to increase cardiac output during exercise. Sufficient cardiac output helps keep blood pressure at the levels needed to supply oxygen-rich blood to your brain and other vital organs.
Detailed explanation-3: -Research states that in healthy individuals, heart rate should decrease between 15-20 beats per minute within the first minute post-exercise. In elite athletes, HRR during the first minute may decrease as much as 23 beats per minute.
Detailed explanation-4: -When we run our cells require more energy to work, so they need more oxygen which is provided by the blood. To increase oxygen level the blood has to be pumped faster and so our heart beat rate increases.
Detailed explanation-5: -The given statement is false. Correct answer will be heartbeat rises sharply during an exercise. Reason: During exercise the oxygen demands of the body increases.