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Multiple Choice
What structures are found within the intercalated disks of cardiac muscle that facilitate electrical conduction?
A
Gap junctions
B
Myofibrils
C
T-tubules
D
Sarcomeres
Verified step by step guidance
1
Understand that intercalated disks are specialized connections between cardiac muscle cells that support synchronized contraction.
Recognize that gap junctions are a key component of intercalated disks, allowing ions and electrical impulses to pass directly between cells, facilitating electrical conduction.
Identify that myofibrils are the contractile elements within muscle cells, but they are not part of the intercalated disks.
Note that T-tubules are involved in transmitting the action potential into the muscle cell, but they are not specifically part of the intercalated disks.
Understand that sarcomeres are the basic contractile units of muscle fibers, but they do not play a direct role in the structure of intercalated disks.