Question

why cardiac muscles has not collapsed ?​

Answer 1

Answer:

in cardiac muscle the duration of action potential is same as the duration of its mechanical response

Answer 2

Answer:

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Your answer goes here:-

Cardiac muscle contracts in a similar manner to skeletal muscle, although with some important differences. An electrical stimulation in the form of an action potential triggers the release of calcium from the cell's internal calcium store, the sarcoplasmic reticulum. The rise in calcium causes the cell's myofilaments to slide past each other in a process called excitation contraction coupling.

Diseases of heart muscle are of major importance. These include conditions caused by a restricted blood supply to the muscle including angina pectoris and myocardial infarction, and other heart muscle disease known as cardiomyopathies.