For Contraction of a Muscle to Being, What Event Must

question 9

Multiple Choice

For contraction of a muscle to being, what event must occur at the sarcolemma?

• A) blockage of reuptake channels
• B) exocytosis of vesicles storing neurotransmitters
• C) intracellular calcium levels increase after potassium entry
• D) acetylcholine binding and opening of sodium channels

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