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Anatomy of a Neuron Action! Getting Across the Membrane Signaling across synapses Don't choose this
100
What is a Soma?
This is another name for a cell body.
100
What is an Action Potential?
The potential that a neuron must reach for an action potential to be generated
100
What are Ligand-gated Channels?
This general kind of channel opens in response to the presence of a neurotransmitter.
100
What are electrical chemical synapses?
The two types of synapses.
200
What is a Synapse?
The junction between a synaptic terminal and another neuron.
200
What is Depolarization?
The type of response an action potential is, because it occurs or it does not
200
What are Voltage-gated Ion Channels?
This general kind of channel opens in response to a change in the membrane potential.
200
What are axo-dendritic synapses?
The majority of synapses are this type.
300
What is an Efferent Neuron?
Conducts impulses away from the cell body to another neuron, muscle, or gland
300
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Closed channels at resting state.
300
What is the Sodium-Potassium Pump?
This membrane protein uses ATP to restore concentrations of Na+ and K+ to their “resting” levels.
300
What is Glutamate
The most common excitatory neurotransmitter in the brain.
400
What is an Afferent Neuron?
Receive stimuli and send signals to the cell body
400
What is Repolarization?
The process in which the membrane potential returns to its resting state
400
What is positive feedback?
A voltage-gated Na+ channel propagates the action potential by using this kind of feedback
400
What is a Nerve Impulse?
This causes the release of neurotransmitter into the synaptic cleft.
500
What is Myelin?
The insulating cover that axons of many neurons are surrounded by
500
What is Resting Potential?
The level an axon depolarizes to in order to generate an action potential
500
What is K+?
When this ion crosses the membrane through specific channels, the membrane
potential becomes more negative
500
Acetylcholine, Dopamine, Serotonin, Glutamate, GABA
The five major groups of neurotransmitters




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