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Questions and Answers
What is the main function of muscle tone in humans?
What is the main function of muscle tone in humans?
- To maintain an upright posture (correct)
- To enhance muscle flexibility
- To support rapid muscle contractions
- To increase muscle mass
Which part of the brain regulates muscle tone?
Which part of the brain regulates muscle tone?
- Cerebellum (correct)
- Cerebrum
- Hypothalamus
- Brainstem
How do muscle fibers manage to not become fatigued during muscle tone?
How do muscle fibers manage to not become fatigued during muscle tone?
- They alternate in contraction (correct)
- All fibers contract continuously
- Only one fiber contracts at a time
- They only contract during exercise
What is a significant energy molecule required for muscle contraction?
What is a significant energy molecule required for muscle contraction?
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What percentage of total body heat at rest is generated by normal muscle tone?
What percentage of total body heat at rest is generated by normal muscle tone?
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During which activity does heat production from muscle fibers significantly increase?
During which activity does heat production from muscle fibers significantly increase?
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What is the main state of most muscles outside of certain sleep stages?
What is the main state of most muscles outside of certain sleep stages?
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Study Notes
Muscle Tone
- Most of our muscles are in a state of slight contraction, known as muscle tone.
- Muscle tone allows us to maintain an upright posture.
- Muscle tone is regulated by the cerebellum of the brain.
- Only a few muscle fibers in a muscle need to contract for muscle tone to occur.
- Muscle tone prevents fatigue by alternating which fibers are contracting.
- Muscle tone is similar to a pianist rippling their fingers over the keys of a piano, constantly changing which notes are being played.
Muscle Tone and Heat Production
- Muscle fibers require ATP (adenosine triphosphate) for contraction.
- Muscle fibers produce heat as a byproduct of ATP production in cell respiration.
- Muscle tone contributes approximately 25% of our total body heat at rest.
- Exercise significantly increases heat production.
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