Question

when athletes run long distances, their muscles become fatigued due to a lack of oxygen. which process helps athletes generate more energy to continue running?

• aerobic respiration
• photosynthesis
• anaerobic respiration
• chemosynthesis

Explanation:

1. Analyze each option:

• Aerobic respiration requires oxygen, so when oxygen is lacking, it's not the main process here.
• Photosynthesis is a process in plants, not in human muscles.
• Chemosynthesis is a process in some bacteria, not related to human muscle energy production.
• Anaerobic respiration occurs in the absence of oxygen and can produce energy (ATP) from glucose, which helps athletes generate energy when oxygen is limited during long - distance running.

Answer:

The correct option is the one corresponding to anaerobic respiration (the third option in the list, assuming the options are: aerobic respiration, photosynthesis, anaerobic respiration, chemosynthesis). So if we denote the options as:
A. aerobic respiration
B. photosynthesis
C. anaerobic respiration
D. chemosynthesis

The answer is C. anaerobic respiration