Question

unit 2 exam 2025 - 26
when muscle cells are exercised extensively in the absence of sufficient
a large amount of atp is formed
nadh molecules split
lactic acid is produced
oxidative respiration ceases

Explanation:

When muscle cells are exercised extensively in the absence of sufficient oxygen, anaerobic respiration occurs. In anaerobic respiration in muscle cells, glucose is broken - down to produce lactic acid. Oxidative respiration requires oxygen, and when there is not enough oxygen, it cannot continue in the same way. A large amount of ATP is produced during aerobic respiration, not in the oxygen - deprived state of extensive muscle exercise. NADH is involved in the electron - transport chain of aerobic respiration and is not split in this context.

Answer:

Lactic acid is produced