Question

multiple choice question when a muscle fiber depletes its stores of creatine phosphate and has a high level of lactic acid, it incurs a(an) period of relaxation oxygen debt threshold stimulus

Explanation:

When muscle fiber depletes creatine - phosphate and has high lactic - acid levels, it means anaerobic respiration has occurred. Oxygen debt is incurred when the body needs to take in extra oxygen to convert lactic acid back to pyruvic acid and replenish creatine phosphate stores. A period of relaxation is not directly related to these metabolic changes. A threshold stimulus is the minimum stimulus required to initiate a muscle contraction, which is not relevant here.

Answer:

B. oxygen debt