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Neuron Structures
Action Potential
AP Continued
Neuron to Neuron Signaling
Autonomic Nervous System
100
The neuron structure that receives stimulation from sensory input or other neurons.
What is the dendrite?
100
At rest the inner membrane has this type of charge.
What is slightly negative?
100
-70 mV
What is the resting potential?
100
The cellular space between the terminal axon and the next neuron.
What is the synaptic cleft or synapse?
100
The two branches of the autonomic nervous system.
What is sympathetic and parasympathetic?
200
This structure carries the AP away from the stoma.
What is the axon?
200
This ion diffuses into the soma when gate is opened.
What is Na+?
200
The place where the impulse skips down the axon.
What is the Nodes of Ranvier?
200
The chemical medium that signals the next neuron.
What is neurotransmitter?
200
Acetylcholine.
What is a neurotransmitter?
300
This cell makes up the myelin sheath of the neuron.
What is the Schwann cell?
300
The stage of an Action Potential where voltage drops below the normal resting potential.
What is Hyperpolarization
300
During the refractory period this brings the K+ and Na+ through the cell membrane.
What is the sodium/potassium pump?
300
The "sac" that contains the neurotransmitters.
What are vesicles?
400
This structure is located in the dorsal root ganglion.
What is the stoma?
400
The resting cell membrane is considered polarized, but when there is a substantial influx of Na+ into the neuron it is considered...
What is depolarization?
400
The period when the Na+ channel gate closes and the K+ opens.
What is repolarization?
400
The action that releases signaling molecules from the axon terminal into the synapse.
What is exocytosis?
400
The action potential dips slightly below the resting potential.
What is hyperpolarization?
500
The structure that is the farthest from the dendrites and where the neurotransmitters are located.
What is the Axon Terminal?
500
The voltage at which the threshold is reached and an AP occurs.
What is -55 mV?
500
The stage during action potential when no additional impulses can be triggered or sent down the axon.
What is refractory period
500
The structure of the neuron where the vesicles are stored.
What is the axon terminal.