Question

What is the primary source of ATP production in ultra short-term (high intensity) exercise performances (i.e., exercise lasting less than 10 seconds)?

a. equal ATP production is derived from glycolysis and oxidative phosphorylation
b. oxidative phosphorylation
c. equal ATP production is derived from phosphocreatine and oxidative phosphorylation
d. phosphocreatine (i.e., ATP-PC system)

Answer 1

In ultra-short-term, high-intensity exercises, the primary source of ATP production is phosphocreatine (ATP-PC system), which provides immediate energy for muscle contractions. The correct option is c. equal ATP production is derived from phosphocreatine and oxidative phosphorylation

Step-by-step explanation:

The primary source of ATP production in ultra short-term (high-intensity) exercise performances, which lasts less than 10 seconds, is phosphocreatine (also known as the ATP-PC system).

During such high-intensity exercises, the body relies on ATP already stored in muscles and additional ATP is quickly regenerated from phosphocreatine stores.

These energy sources are ideal for immediate and rapid ATP supply, providing energy for muscle contractions at the very beginning of exercise.

As the ATP and phosphocreatine are depleted, which occurs after about 15 seconds, the muscle must then turn to slower ATP generation methods like glycolysis and oxidative phosphorylation, which are less effective for ultra short-term, explosive movements. The correct option is c. equal ATP production is derived from phosphocreatine and oxidative phosphorylation