95.6k views
2 votes
Action potentials generally are not transmitted along dendrites because they have:

a) Voltage-gated channels
b) Myelin sheaths
c) Lack of ion channels
d) Synaptic vesicles

1 Answer

4 votes

Final answer:

Action potentials are not transmitted along dendrites due to the lack of ion channels. Instead, they propagate along myelinated axons in a saltatory manner, jumping from node to node. Neurons have charged membranes due to different ion concentrations inside and outside the cell.

Step-by-step explanation:

Action potentials are not generally transmitted along dendrites because they lack ion channels.

Neurons have charged membranes due to different ion concentrations inside and outside the cell. Voltage-gated ion channels control the movement of ions into and out of a neuron. When a neuronal membrane is depolarized to a certain threshold, an action potential is fired and propagated along a myelinated axon to the axon terminals. In unmyelinated axons, the action potential propagates continuously, while in myelinated axons, it happens in a saltatory manner, jumping from one node of Ranvier to the next.

User JonHendrix
by
8.5k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.