Question: What are T-tubules? Select one: a. infoldings of the sarcolemma b. infoldings of the sarcoplasmic reticulum c. dense areas of mitochondria d. contractile proteins e.

What are T-tubules?

Select one:

a. infoldings of the sarcolemma

b. infoldings of the sarcoplasmic reticulum

c. dense areas of mitochondria

d. contractile proteins

e. leaky membranes 

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