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How will cooling the heart down effect heart rate and contraction and state the physiological reasoning...

How will cooling the heart down effect heart rate and contraction and state the physiological reasoning behind this (good reasoning and explanation please).

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Answer #1

Cooling the heart down results in decreased heart rate and contraction.

Reason–

-Ion channels and enzymes both are proteins which also cool down along with heart.

-Cooling decreases the rate at which channels open and close and hence decreases the pacemaker activity and heart rate.

-as the rate of opening and closing of channels decreases it moves it further from reaching the threshold so that the action potential and heart contractions takes place at slower rate.

Hope this helps!!

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