Excitation-contraction coupling requires which of the following substances?
A) ATP only
B) Ca2+ and ATP
C) Ca2+ only
D) ATP and glucose
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Which of the following would be recruited later in muscle stimulation when contractile strength increases?
A) large motor units with small, highly excitable neurons
B) many small motor units with the ability to stimulate other motor units
C) motor units with larger, less excitable neurons
D) motor units with the longest muscle fibers
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The strongest muscle contractions are normally achieved by ________.
A) recruiting small and medium muscle fibers
B) increasing stimulus above the treppe stimulus
C) increasing the stimulation up to the maximal stimulus
D) increasing stimulus above the threshold
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Fatigued muscle cells that recover rapidly are the products of ________.
A) slow exercise of long duration
B) slow exercise of short duration
C) intense exercise of long duration
D) intense exercise of short duration
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