Question

To prolong survival during fasting, the body goes through which of the following adaptations?

- reduction in energy requirements
- slowing of metabolic rate
- reduction in required sleep
- nervous system uses less glucose

Answer 1

During fasting, the body adapts by reducing energy requirements and slowing down the metabolic rate to conserve resources. It utilizes fatty acids and ketone bodies for fuel and conserves protein to maintain muscle and organ tissues.

Step-by-step explanation:

To prolong survival during fasting, the body goes through several adaptations. One key adaptation is a reduction in energy requirements, initiated by a slowing of the metabolic rate. This metabolic change is crucial for conserving energy when the body is not receiving food. The body switches to using alternative energy sources, such as fatty acids and ketone bodies, to satisfy its energy needs. Ketone bodies become particularly important as a fuel for the brain and other organs when glucose levels are low. Protein breakdown is also reduced to conserve muscle and organ tissues. These physiological changes are critical for supporting the body during extended periods of no food intake.