Action potentials in the heart move from one contractile cell to the next via ________.
A) chemical synapses using acetylcholine
B) chemical synapses using norepinephrine
C) intercalated disks
D) non-myelinated motor neurons

Question

Quizplus · Accepted Answer

Intercalated disks are specialized junctions between cardiac muscle cells that allow for the rapid conduction of action potentials between cells. This is essential for the coordinated contraction of the heart. A and B are incorrect because chemical synapses and neurotransmitters are not involved in transmitting action potentials between cardiac muscle cells. D is incorrect because there are no motor neurons involved in heart contractions.

Action Potentials in the Heart Move from One Contractile Cell