Neurons Flashcards
1
Q
Neuron definition
A
- cells that transmit nerve impulses (action potential)
- functional unit of the NS
2
Q
Neuron characteristics
A
- typically amiotic (doesn’t divide)
- electrically excitable (converts stimulus into an electrical signal)
- role: transmit messages (nerve impulses)
3
Q
Neural structure
A
- dendrites
- cell body
- axon hillock
- axon
- axon terminal
4
Q
Dendrites
A
-branched structures that receive input (from other neurons)
5
Q
Cell body
A
-location of many organelles, receives input from dendrites
6
Q
Axon hillock
A
- cone-shaped region important in AP generation
- integrates info from dendrites
7
Q
Axon
A
-runs AP along the axon towards another neuron or effector
8
Q
Axon terminal
A
-structure at the end of the axon that communicates with another neuron or effector
9
Q
Synapse
A
-junction between a neuron and its target
target may be another neuron or effector
10
Q
Synaptic cleft
A
-small gap between the neuron and its target
11
Q
Neurotransmitters
A
-vesicles at the axon terminal, released and diffused across the synaptic cleft
