Question

energy for contraction of cardiac muscle cells comes primarily from multiple choice aerobic respiration in the mitochondria. anaerobic respiration in the cytosol. glycolysis in the cytosol. atp that is stored while the heart is not contracting. creatine phosphate.

Explanation:

Cardiac muscle cells require a continuous and efficient energy - supply. Aerobic respiration in mitochondria is the primary source as it generates a large amount of ATP. Anaerobic respiration and glycolysis in the cytosol produce less ATP compared to aerobic respiration. Stored ATP and creatine phosphate are used for short - term energy needs, not as the primary source.

Answer:

aerobic respiration in the mitochondria