20. \"all-or-none\" in reference to skeletal muscle means: a. all of the muscle

Question

20. "all-or-none" in reference to skeletal muscle means: a. all of the muscle fibers in a muscle must contract at the same time b once started, muscle contraction cannot be stopped - it travels the entire length of the cell - either the fiber contracts or it doesn't all of the muscles in the same area of the body contract at the same time contraction produces movement or there is no contraction c. d. 21. Graded responses may be produced by changing b. c. d. the frequency and number of muscle cells being stimulated at one time the frequency of muscle stimulation only the number of muscle cells being stimulated only there is no such thing as a graded response in skeletal muscle

Explanation / Answer

20. according to all or none law the muscle or nerve responds completely or not at all. so the option B is the right answer.

21. option A - Frequency of muscle stimulation and Number of muscle cells being stimulated at one time.

you have given the right answers.

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