★ Cell and Muscle Histology Quiz
Which feature typifies T-tubules?
A. Evaginations of the sarcoplasmic reticulum
B. Sequester calcium during muscle relaxation, releasing it during contraction
C. Carry depolarization to the muscle fiber interior
D. Overlie the A-I junction in cardiac muscle cells
E. Rich supply of acetylcholine receptors
Select your answer:
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