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

The answer that would best complete the given statement above would be option C. 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 ANAEROBIC RESPIRATION that led to production of LACTATE or LACTIC ACID. Hope this answers your question.

Answer 2

The right option is; C) anaerobic respiration; lactate

Anaerobic respiration is a cellular respiration that occurs in absence of oxygen. In this process, glucose is broken down into molecules without oxygen to produce energy which is transferred to the cell with the production of lactic acid. Anaerobic respiration is used by eukaryotic cells such as in human muscles during extraneous activities when the oxygen supply is low. There is high production of lactic acid (lactate) which provides the required energy (ATP molecules) for cellular activities. This weaken the muscles and it can cause painful muscle cramps.