When an Olympic Weightlifter Uses Explosive Strength to Lift a Personal

question 18

Multiple Choice

 When an Olympic weightlifter uses explosive strength to lift a personal best, the _________ fibers in her legs are probably the most active, but the marathon runner relies on her _________ fibers.

• A) slow-twitch; fast-twitch
• B) fast-twitch; slow-twitch
• C) Type I; Type III
• D) Type III; Type II

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Definitions:

Citric Acid Cycle

A sequence of biochemical processes undergone by every organism that uses oxygen to produce energy by oxidizing acetate, which comes from carbohydrates, fats, and proteins.

Acetyl CoA

A central molecule in metabolism, used in biochemical reactions for energy production and synthesis of fatty acids.

Aerobic Respiration

The process of producing cellular energy involving oxygen. Cells break down food in the mitochondria in a long, multistep process that produces roughly 36 ATP.

Nitrate

A compound containing nitrogen and oxygen (NO3-) that is a vital plant nutrient and can also be found in water supplies, where high levels can be harmful to health.