Question

Which of the following are commonly used to produce ATP during skeletal muscle contraction? a) creatine phosphate b) anaerobic cellular respiration c) aerobic cellular respiration d) All of these choices are correct.

Answer 1

During skeletal muscle contraction, ATP is commonly produced through creatine phosphate, anaerobic cellular respiration, and aerobic cellular respiration.

Step-by-step explanation:

Correct answer of this question is d) All of these choices are correct.

During skeletal muscle contraction, ATP (adenosine triphosphate) is commonly produced through multiple mechanisms. These mechanisms include:

1. Creatine phosphate: Creatine phosphate provides a quick source of ATP at the beginning of muscle contraction. It can supply energy for about 15 seconds.
2. Anaerobic cellular respiration (glycolysis): In the absence of oxygen, glucose or glycogen can be broken down through glycolysis to produce ATP and pyruvate. Pyruvate can then be used for further ATP production through anaerobic respiration. This mechanism provides energy for a short period.
3. Aerobic cellular respiration: Aerobic respiration utilizes oxygen to break down glucose in the presence of oxygen to produce ATP. This mechanism generates much more ATP than anaerobic respiration and allows the muscle to work for longer periods.

Therefore, all of the given choices (creatine phosphate, anaerobic cellular respiration, and aerobic cellular respiration) are commonly used to produce ATP during skeletal muscle contraction.