2. Which of the following best explains why muscle cells have more mitochondria than most other types of cells? a. Muscle cells need to be able to communicate with the nervous system to control their contraction and relaxation

b. Muscle cells need to be able to capture energy from the sun to produce energy is a usable form

c. Muscle cells need to be able to store large amounts of nutrients and waste because they are so active

d. Muscle cells need to quickly convert energy from food molecules into a usable form​