After about three seconds of exercise,which substance is broken down to help regenerate ATP?
A) glucose
B) pyruvic acid
C) creatine phosphate (CP)
D) lactic acid

Question

Quizplus · Accepted Answer

During the first few seconds of exercise, the body uses stored ATP for energy. However, as ATP stores deplete, the body then turns to the storage molecule creatine phosphate (CP) to help regenerate ATP. CP can donate phosphate to ADP to quickly generate ATP for immediate use by muscles. Glucose and pyruvic acid are broken down during glycolysis to produce ATP, but this process takes longer than the initial few seconds of exercise. Lactic acid is a byproduct of anaerobic metabolism and is produced after several minutes of exercise.

After About Three Seconds of Exercise,which Substance Is Broken Down