Question

if cindy wanted to increase her endurance by taking supplements or drugs, she w 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:

Enhancement of endurance relies on efficient oxygen delivery to muscles. Red blood cells carry oxygen; increasing their oxygen uptake directly boosts oxygen transport, which is critical for sustained physical activity. Other options (sugar release, carbohydrate uptake, insulin release) relate to energy metabolism but are not the primary target of endurance-enhancing supplements/drugs focused on oxygenation.

Answer:

A. uptake of oxygen by red blood cells