A 22-year-old man is going in for surgery and requires intubation. He is put under a general anesthetic and prior to intubation given succinylcholine to temporarily "paralyze" muscles and allow for easier insertion of the endotracheal tube. Succinylcholine competes with the natural signal at the neuromuscular junction (acetylcholine) and causes an extended depolarization that prevents muscles from initiating action potentials and contracting.
The action potential of an unparalyzed skeletal muscle

Question

A 22-year-old man is going in for surgery and requires intubation. He is put under a  general anesthetic  and prior to intubation given succinylcholine to temporarily "paralyze" muscles and allow for easier insertion of the endotracheal tube. Succinylcholine competes with the natural signal at the neuromuscular junction (acetylcholine) and causes an extended depolarization that prevents muscles from initiating action potentials and contracting.  
 The action potential of an  unparalyzed  skeletal muscle

Answer

has a prolonged plateau phase.

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causes the immediate uptake of Ca 2+  into the terminal cisterns of the sarcoplasmic reticulum.

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is  not essential for contraction.

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is longer than the action potential of cardiac muscle.

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spreads inward to all parts of the muscle via the T tubules.

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A 22-year-old man is going in for surgery and requires intubation. He is put und...

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