ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is it called when adrenalin causes your heart rate to increase before you start activity?
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Nervous twitch
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Excitement rise
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Anticipation
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Anticipatory rise
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Explanation:
Detailed explanation-1: -The phenomenon is called the ‘anticipatory rise’.
Detailed explanation-2: -An increase in heart rate that typically occurs just before an activity is to be undertaken. It results from an increase in activity of the sympathetic nervous system causing the adrenal glands to release adrenaline and noradrenaline into the blood stream.
Detailed explanation-3: -Adrenaline is a hormone which results in an increase in heart rate, blood pressure and alertness. anticipatory rise.
Detailed explanation-4: -Bath application of the sympathetic transmitter adrenaline acts through -receptors and causes increased [Ca2+]i transients, which appear to be the major cause of the increase in firing rate.
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