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) electrical synapses using gap junctions.
D) myelinated motor neurons.
E) non-myelinated motor neurons.

Question

Quizplus · Accepted Answer

Action potentials in the heart move from one contractile cell to the next via electrical synapses using gap junctions. Gap junctions allow for direct transfer of ions and electrical signals between adjacent cells, allowing for rapid and coordinated contraction of the heart. Chemical synapses using acetylcholine or norepinephrine, as well as myelinated and non-myelinated motor neurons, are not involved in the normal conduction of action potentials in the heart.

Action Potentials in the Heart Move from One Contractile Cell