Question

analyze the cellular composition of a heart muscle cell versus a fat storage cell. why would the heart muscle cell have a significantly higher concentration of mitochondria? because heart cells need to synthesize more proteins than fat cells. because heart cells need to detoxify more substances than fat cells. because heart cells need to store large amounts of fat. because heart cells have a constant high energy demand for contraction, which mitochondria supply via atp.

Explanation:

To determine the correct answer, we analyze the function of mitochondria (energy production via ATP) and the needs of heart muscle cells. Heart muscle cells constantly contract, requiring high energy. Mitochondria produce ATP for energy. The other options: protein synthesis (ribosomes, not mitochondria), detoxification (liver cells, not heart), fat storage (adipocytes, not heart muscle cells) are incorrect.

Answer:

D. Because heart cells have a constant high energy demand for contraction, which mitochondria supply via ATP. (assuming the last option is D; if the options were labeled A - D with the last being D, else adjust the label as per the actual option numbering, but the text of the correct option is as stated)