An "internal reservoir" of oxygen in rested muscle is found in oxygen molecules bound to
A) hemoglobin.
B) bicarbonate ions.
C) carbonic acid.
D) actin and myosin.
E) myoglobin.

Question

Quizplus · Accepted Answer

Myoglobin is a protein found in muscle tissue that binds to and stores oxygen. It serves as an internal reservoir of oxygen in rested muscle, allowing for quick access to oxygen when needed for energy production during muscle contraction. Hemoglobin is a protein found in red blood cells that binds to and transports oxygen throughout the body, but it is not present in rested muscle tissue. Bicarbonate ions and carbonic acid are involved in regulating the pH balance of the blood and do not play a role in storing oxygen in muscle tissue. Actin and myosin are contractile proteins in muscle tissue that are involved in the process of muscle contraction, but they do not store oxygen.

An "Internal Reservoir" of Oxygen in Rested Muscle Is Found