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Animal Physiology Question 1. A good pump always has a contraction-relaxation cycle that is completed before the...

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Medical Sciences

Animal Physiology Question

1. A good pump always has a contraction-relaxation cycle that iscompleted before the next cycle. How is this achieved in cardiacmuscle, providing the necessary details in terms of ion movementand tension generation in the muscle fibers? What feature ofskeletal muscle would make it a terrible pump?

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4.2 Ratings (699 Votes)
The contraction and relaxation cycle of heart is maintained by pacemaker cells in SA node which generates cardiac action potential at regular intervals and causes change in membrane potential and results in movement of ions across cell membrane and regulates contraction and relaxation of cardiac muscle SA node generates the cardiac action potential which changes voltage across cell    See Answer
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