CardMusc — KinFAST

Adaptive test — questions are selected based on your ability estimate. — Tag: SRTubuleOrganization

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How does the sarcoplasmic reticulum and T-tubule organization of cardiac muscle differ from that of skeletal muscle?

Cardiac muscle has no T-tubules and relies entirely on extracellular calcium entry through the sarcolemma Cardiac muscle has larger but less frequent T-tubules located at the Z-disk, with less developed sarcoplasmic reticulum and no terminal cisternae forming triads Cardiac muscle has more extensive sarcoplasmic reticulum than skeletal muscle to support its continuous contraction Cardiac muscle has smaller, more frequent T-tubules at the A-I band overlap, with terminal cisternae forming triads at every sarcomere

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