Podcast
Questions and Answers
What happens to a muscle when it contracts?
What happens to a muscle when it contracts?
- It becomes shorter and thinner.
- It becomes longer and thinner.
- It remains the same size.
- It becomes shorter and thicker. (correct)
During the extension of the forearm, the biceps contracts.
During the extension of the forearm, the biceps contracts.
False (B)
What two muscles work in opposition to allow for arm movements?
What two muscles work in opposition to allow for arm movements?
biceps and triceps
During flexion of the forearm, the biceps ______ while the triceps relaxes.
During flexion of the forearm, the biceps ______ while the triceps relaxes.
Match the arm movement with the state of the biceps and triceps muscles:
Match the arm movement with the state of the biceps and triceps muscles:
Flashcards
Muscle Contraction
Muscle Contraction
A muscle becomes shorter and thicker as it contracts, causing movement.
Muscle Relaxation
Muscle Relaxation
The opposite of contracting, a muscle becomes longer and thinner, allowing for a return to the initial position.
Antagonistic Muscle Pairs
Antagonistic Muscle Pairs
Muscles work in pairs, where one contracts while the other relaxes to produce movement.
Flexion
Flexion
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Extension
Extension
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