The skeletal muscle action potential______________?
Correct answer: D. Spreads in ward to all parts of the muscle via the t- tubule system
- A. Is not essential for contraction to occur
- B. Has a prolonged plateau phase?
- C. Begins with an, in ward movement of K+ ins
- D. Spreads in ward to all parts of the muscle via the t- tubule system
Explanation
The skeletal-muscle action potential travels along the sarcolemma and deep into the fibre through the transverse tubules, allowing nearly simultaneous activation of the myofibrils. It has no prolonged plateau, and its upstroke is due mainly to inward sodium movement, not potassium.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Cell and General Physiology
31 free Cell and General Physiology MCQs from Physiology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physiology questions like this
Physiology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Cell and General Physiology questions
Rigor mortis results after death is due to________________?
All are features of skeletal muscle except______________?
In excitable cells, repolarization is closely associated with, one of the following events_______________?
Electromyography is used for________________?
Skeletal muscles______________?
The contractile element in a skeletal muscle is present in______________?