Final answer:
True. The body has mechanisms to maintain homeostasis and meet energy requirements in emergencies. (option A is the correct answer).
Step-by-step explanation:
The statement is true. Glycogen acts as an emergency/reserve source of energy in the body. Glycogen is a polysaccharide, composed of glucose molecules, that is primarily stored in the liver and muscles. During periods of fasting or low blood glucose levels, glycogen is broken down into glucose through a process known as glycogenolysis.
The released glucose can then be utilized to maintain blood glucose levels and provide a quick source of energy, especially during times of increased energy demand or between meals. This mechanism helps ensure a steady supply of glucose, the primary fuel for many tissues and supports the body's energy needs during challenging conditions.
Recognizing the role of glycogen as an emergency/reserve source of energy underscores its importance in maintaining energy balance in the body. This glycogen storage and mobilization mechanism contributes to the body's ability to respond to varying energy demands and maintain essential functions.