Question

Alf lifts weights vigorously for 25 minutes. A few hours after exercise, he notices that his muscles are sore and slightly swollen.

His muscle cells have experienced ______________ that led to production of _______________.
A) fermentation; alcohol
B) nitrogen fixation; water
C) anaerobic respiration; lactate
D) aerobic respiration; carbon monoxide

Answer 1

his muscle cells have experienced anaerobic respiration that led to production of lactate.

this is because after exercise our body requires a lot of energy and to fulfill the energy requirement, the rate of respiration increases resulting in anaerobic respiration.