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# Currents Triggering an Action Potential

NEURO-MD70GZ

In the experimental setting, action potentials can be triggered by injecting positive currents into an axon.

In multipolar neurons, action potentials are usually triggered by currents orginating from which of the following channels?

A

Passive ${ K }^{ + }$ channels in the cell body of the neuron.

B

Ligand-gated ion channels in the dendrites of the neuron.

C

Voltage-gated ${ Na }^{ + }$ channels in the dendrites of the neuron.

D

Voltage-gated ${ Na }^{ + }$ channels in the axon of the neuron.