Question

if cindy wanted to increase her endurance by taking supplements or drugs, she would be attempting to increase the
a. uptake of oxygen by red blood cells
b. release of sugars in the blood stream
c. uptake of carbohydrates by the body
d. release of insulin in the body
please select the best answer from the choices provided.
a
b
c
d

Explanation:

• Red blood cells carry oxygen. Increasing oxygen uptake by red blood cells means more oxygen is available for cells to produce energy (through cellular respiration), which enhances endurance.
• Releasing sugars in the bloodstream (B) is related to short - term energy spikes but not directly to endurance in the same way as oxygen supply.
• Uptake of carbohydrates (C) is part of energy metabolism, but it's the oxygen - dependent breakdown of these carbohydrates (and other fuels) that is crucial for sustained endurance.
• Release of insulin (D) is mainly involved in regulating blood sugar levels, not in directly increasing endurance.

Answer:

A. uptake of oxygen by red blood cells