Gap Junctions Are Made Up of Specific Proteins Called Connexin

question 31

Multiple Choice

Gap junctions are made up of specific proteins called connexin.If _______ muscle cells were unable to make connexin, then _______.

• A) skeletal; the muscle fibers would be unable to contract
• B) smooth; muscles of the gut would continue to work as usual
• C) cardiac; the heart could not function normally
• D) skeletal; one muscle fiber would still be able to transmit a contraction signal directly to a neighboring muscle fiber
• E) smooth; one muscle fiber would still be able to transmit a contraction signal directly to a neighboring muscle fiber

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