The sarcolemma of a resting muscle fiber is most permeable to?

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19-12-2022
Biology

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The sarcolemma of a resting muscle fiber is most permeable to?

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sapanpandit sapanpandit · Answer 1 · 2022-12-24T08:57:46-05:00

This makes the sarcolemma more permeable to sodium ions, causing their entry.

Acetylcholine is released from the synaptic vesicles and travels through the synaptic cleft and binds to protein receptors in the sarcolemma. The sarcolemma is the plasma membrane of the muscle cell and is surrounded by a basement membrane and endomysial connective tissue. The sarcolemma is an excitable membrane and shares many properties with the neuronal cell membrane. Permeability refers to the ability of ions to cross the membrane and is directly proportional to the total number of channels open for a given ion in the membrane. The membrane is permeable to potassium ions at rest because many channels are open.

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