Muscle cells have a high concentration of mitochondria.
Regulation of metabolic enzymes in skeletal muscle occurs in response to changes in ATP demand, substrate availability, and in response to hormonal and neural stimulation.
The muscle fiber is an elongated cell whose length can reach several centimeters.
The sarcoplasm of a muscle fiber contains many mitochondria.
They are those that produce energy (ATP) directly usable by the muscle fiber to contract its myofibrils, which are the contractile elements of skeletal muscle cells.
Therefore, we can conclude that adenosine triphosphate (ATP) is the basic source of energy for muscle contraction is ATP and muscle cells have a high concentration of mitochondria.
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