Asked by Walter Rutherford on May 10, 2024
Verified
Why does muscle activity affect the temperature of the body?
A) The rate of chemical reactions increases in muscle fibers during contraction, so the rate of heat production also increases.
B) Muscle contraction generates pyrogens which reset the body's internal thermostat to a higher temperature.
C) Muscle activity directs more warm blood to the muscles away from the central core causing a cooling effect on your internal organs.
D) Increased muscle activity causes a rise in adipose stores which increases the insulation value of the body.
Muscle Activity
The action of muscle fibers contracting and relaxing, which results in movement or the maintenance of posture.
Chemical Reactions
Processes in which one or more substances are chemically changed into one or more new substances.
Pyrogens
Substances that cause fever by acting on the hypothalamus's temperature-regulating center.
- Understand the physiological changes in muscle activity and their effects on body temperature.
Verified Answer
DL
Donavon LewisMay 12, 2024
Final Answer :
A
Explanation :
Muscle activity increases the temperature of the body primarily because the rate of chemical reactions in muscle fibers increases during contraction, leading to an increased rate of heat production. This is a direct consequence of the energy expenditure required for muscle contraction, where the conversion of chemical energy (ATP) into mechanical work is inherently inefficient, resulting in the production of heat.
Learning Objectives
- Understand the physiological changes in muscle activity and their effects on body temperature.