A tennis player serving the ball uses fast muscle fibers. The ATP needed to accomplish this comes from
A)anaerobic fermentation.
B)aerobic respiration.
C)conversion of lactic acid to ATP.
D)conversion of Ca²⁺ to ATP.

Question

Quizplus · Accepted Answer

Fast muscle fibers rely primarily on anaerobic fermentation to produce ATP, which does not require oxygen and can quickly supply energy for short bursts of activity like serving a tennis ball. Aerobic respiration, which requires oxygen and provides more sustained energy, is used by slow-twitch fibers for endurance activities like distance running. The conversion of lactic acid to ATP occurs during recovery periods, and calcium ions are not directly involved in ATP production.

A Tennis Player Serving the Ball Uses Fast Muscle Fibers