25) The all-or-none response means that A) all of the muscles in a region contra

Question

25) The all-or-none response means that A) all of the muscles in a region contract together. B) when a muscle fiber contracts, it contracts completely C) all of the muscle fibers within a muscle contract together. D) when a muscle fiber contracts, all of its ATP is converted to ADP E) none of the above 26) In a recording of a muscle twitch, the delay between the stimulus and the muscle response is called the A) refractory period. 3 latent period. C) contraction period D) relaxation period. E) both B and D ncreasing the frequency of stimulation so that a muscle contracts without relaxation is called A) tetany B) a twitch. C) relaxation. D) recovery E) recruitment. 27) I 28) Which of the following activities would employ isometric contractions A) flexing the forearnm B) chewing food C) standing at attention D) running E) writing 29) Contraction during muscle lengthening is called A) eccentric contraction. B) concentric contraction. C) isometric contraction. D) isotonic contraction. E) all ofthe above 30) Which of the following would have the lowest density of motor units? A) large muscles of the upper arms B) postural muscles of the back C) muscles that control the eye D) leg muscles E) the calf muscle

Explanation / Answer

Answer:

25. The all or none response means that when a muscle fibre contracts, It contracts completely.

26. In recording of a muscle twitch, the delay between the stimulus is applied and the muscle response is called the latent period.

27. Increasing the frequency of stimulation so that a muscle contracts without relaxation is called tenany.

28. Standing at attention activities would employ isometric contraction.

29. Contraction during muscle lengthing is called eccentric contraction.

30. Postural muscle of the back would have lowest density of motor unit.

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