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Cardiac muscle cells cannot fire an action potential until the muscle has relaxed from the previous...

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Medical Sciences

Cardiac muscle cells cannot fire an action potential until themuscle has relaxed from the previous beat. From this you knowthat

Select one:

a. Ligand-gated sodium channels remain closed until calcium ispumped away from the sarcomeres

b. Voltage-gated sodium channels must be inactivated untilcalcium is pumped away from the sarcomeres.

c. Ligand-gated potassium channels remain open until calcium ispumped away from the sarcomeres.

d. Voltage-gated potassium channels must not open until calciumis pumped away from the sarcomeres

Answer & Explanation Solved by verified expert
4.0 Ratings (723 Votes)
b Voltagegated sodium channels must be inactivated until calcium is pumped away from the sarcomeres Explanation A soon cardiac muscle cell depolarizes and its potential shoots up to    See Answer
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