Intercalated disks _______.
A) are specialized muscle fibers that conduct the impulse directly to the AV node
B) are tight junctions between cardiac muscle fibers that allow an impulse to pass rapidly from one fiber to the next
C) are the terminal fibers in the heart's conduction system
D) initiate the cardiac cycle

Question

Quizplus · Accepted Answer

Intercalated disks are specialized junctions between adjacent cardiac muscle fibers that allow for rapid transmission of electrical impulses from one fiber to the next. They contain gap junctions which allow ions to flow between cells, synchronizing the contraction of the heart.

Intercalated Disks _______