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Phase I of Succinylcholine Action: Depolarization and Muscle Fasciculation

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Phase I of Succinylcholine Action: Depolarization and Muscle Fasciculation

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Questions and Answers

What is the primary action of succinylcholine in Phase I?

It inhibits muscle contraction
It causes muscle relaxation
It acts as a Nm agonist (correct)
It acts as a neuromuscular blocker

What is the clinical manifestation of Phase I of succinylcholine action?

Muscle weakness
Muscle paralysis
Muscle fasciculations (correct)
Muscle atrophy

What is the sequence of events in Phase I of succinylcholine action?

Repolarization followed by depolarization
Muscle fasciculations followed by initial depolarization
Initial depolarization followed by muscle fasciculations (correct)
Depolarization followed by repolarization

What is the term used to describe the initial muscle twitches caused by succinylcholine in Phase I?

Muscle fasciculations (A) Signup and view all the answers

What phase of succinylcholine action follows the initial depolarization and muscle fasciculations?

Phase II (B) Signup and view all the answers

What is the function of succinylcholine in Phase I?

Nm agonist (B) Signup and view all the answers

What occurs immediately after the initial depolarization in Phase I?

Phase II (B) Signup and view all the answers

What is the characteristic feature of Phase I of succinylcholine action?

Initial depolarization and muscle fasciculations (D) Signup and view all the answers

What is the effect of succinylcholine on muscle in Phase I?

Muscle depolarization (B) Signup and view all the answers

What is the outcome of succinylcholine action in Phase I?

Muscle stimulation and fasciculations (D) Signup and view all the answers