Which of the following is not a feature of cardiac muscle? multiple choice they depend almost exclusively on aerobic respiration. they are rich in glycogen. they are very rich in myoglobin. they have larger than average mitochondria. they have about the same endurance as skeletal muscle fibers.

The answer is: they are rich is glycogen

Explanation:

Cardiac muscle which is found only in the walls of the heart is striated and multi nucleated, and its contractions are not under controlled by the autonomic nervous system. It is highly resistant to fatigue due to the presence of a large number of mitochondria, myoglobin and a good blood supply allowing continuous aerobic metabolism.

However the glycogen is majorly stored in the skeletal muscle and liver, not the cardiac muscle.