If Sodium Ions Cannot Enter a Muscle Fiber in Response

question 103

Multiple Choice

If sodium ions cannot enter a muscle fiber in response to a stimulus,

• A)contraction cannot occur.
• B)relaxation cannot occur.
• C)sodium ions will be released from the sarcoplasmic reticulum instead.
• D)the active sites are left exposed.
• E)the action potential travels into the muscle anyway.

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