Question

multiple choice 1 point
what determines the proportion of slow and fast twitch muscle fibers in a person?
diet
genetics
age
multiple choice 1 point
what process do slow twitch muscles use to create atp?
anaerobic cell respiration
lactic acid fermentation
photosynthesis
aerobic cell respiration

Explanation:

5.

• Diet mainly affects overall nutrition and energy levels but not the proportion of slow - fast twitch muscle fibers.
• Age can affect muscle mass and function but the basic proportion of slow and fast - twitch fibers is determined at a genetic level.
• Genetics determines the proportion of slow and fast - twitch muscle fibers. Muscle fiber type is largely an inherited trait.

• Anaerobic cell respiration (like lactic acid fermentation) is more associated with fast - twitch fibers during high - intensity, short - duration activities.
• Photosynthesis is a process in plants, not in muscle cells.
• Slow - twitch muscles are more oxidative and rely on aerobic cell respiration. They have more mitochondria and use oxygen to produce ATP efficiently for sustained, low - intensity activities.

Answer:

B. genetics

6.