BLAH! More Kaplan Bio question issues

[hokie4life]

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kaplan has errors and its confusing me again, want to see if it's them or me making the error:

issue: kaplan bio test 4, question 8: says skeletal muscle does not have intercellular conductivity of action potentials.

But i thought muscle cells can transmit action potentials!! I looked it up and the review notes say that the "sarcolemma is capable of propagating an action potential ...and the Tsystem can propagate action potential too"


AH the hardest part about kaplan is sifting through its errors, I second guess them all the time now, please someone tell me what's going on here😕

 

[bennijai]

yea i was quite confused with that question as well...

 

[Sillygirl]

I had the same question!

 

[ilzmastr]

Yea, I just got that question wrong too.
I think the idea is that T-tubules surrounding the fibers deliver the action potential to lots of muscle cells, but an action potential does not flow from one sarcomere to another in skeletal muscle.
I guess strictly intercellular conduction of action potentials would be in the cardiac muscle where there are gap junctions in the intercalated discs and action potential can spread from one sarcomere to another.
So i guess its just a matter of strictly applying the word intercellular