Topic 19: Nervous System - Neuron Classification Flashcards
1
Q
What is the structural/anatomical way of classifying neurons?
A
based on number of cell processes off of cell body
2
Q
What is a unipolar neuron? (2)
A
- 1 process that divides into 2
3
Q
Which divisions are unipolar found? (2)
A
- CNS and PNS
- always sensory
4
Q
Explain how peripheral system is unipolar (2)
A
- peripheral end has dentrites = sensory receptors (pain, touch, etc.)
- remainder is axon
5
Q
What are bipolar neurons? (3)
A
- 2 processes:
- 1 axon
- 1 process with dendrites
6
Q
What type of neurons are bipolar neurons? (2)
A
- sensory
ex. retina, nose (olfaction)
7
Q
What are multipolar neurons? (3)
A
- 3 or more processes
- 1 axon
- many dendrites
8
Q
Which neurons are multipolar?
A
- interneurons
- motor neurons
9
Q
what is the functional way of classifying neurons?
A
- based on direction of impulse conduction
10
Q
Name the 3 functional neuron names
A
- sensory/afferent
- interneurons
- efferent/motors
11
Q
What is the functional classification of sensory/afferent neurons? (2)
A
- mostly unipolar
- from sensory receptors to CNS
12
Q
What is the functional classification of interneurons? (3)
A
- within CNS between sensory and motor
- 99% of neurons
- mostly multipolar
13
Q
What is the functional classification of motor/efferent neurons? (2)
A
CNS to effectors
- all multipolar