Question

which are characteristics of a slow oxidative fiber?
a.) contract relatively slowly, fatigue relatively slowly, and use aerobic respiration to produce atp.
b.) contract relatively slowly, fatigue relatively rapidly, and use aerobic respiration to produce atp.
c.) contract relatively rapidly, fatigue relatively slowly, and use anaerobic respiration to produce atp.
d.) contract relatively slowly, fatigue relatively rapidly, and use anaerobic respiration to produce atp.

Explanation:

Slow oxidative fibers, also known as Type I fibers, are characterized by slow contraction speed. They have a high resistance to fatigue because they rely on aerobic respiration (which uses oxygen and generates ATP more sustainably over time compared to anaerobic respiration). Aerobic respiration allows for a continuous supply of ATP during prolonged muscle activity. Options b, c, and d have incorrect combinations (e.g., option b has fast fatigue which is wrong for slow oxidative; option c has fast contraction which is incorrect; option d has both fast fatigue and anaerobic respiration which are wrong for slow oxidative fibers).

Answer:

A. contract relatively slowly, fatigue relatively slowly, and use aerobic respiration to produce ATP.