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

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2
Q

What is a unipolar neuron? (2)

A
  • 1 process that divides into 2
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3
Q

Which divisions are unipolar found? (2)

A
  • CNS and PNS
  • always sensory
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4
Q

Explain how peripheral system is unipolar (2)

A
  • peripheral end has dentrites = sensory receptors (pain, touch, etc.)
  • remainder is axon
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5
Q

What are bipolar neurons? (3)

A
  • 2 processes:
  • 1 axon
  • 1 process with dendrites
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6
Q

What type of neurons are bipolar neurons? (2)

A
  • sensory
    ex. retina, nose (olfaction)
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7
Q

What are multipolar neurons? (3)

A
  • 3 or more processes
  • 1 axon
  • many dendrites
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8
Q

Which neurons are multipolar?

A
  • interneurons
  • motor neurons
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9
Q

what is the functional way of classifying neurons?

A
  • based on direction of impulse conduction
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10
Q

Name the 3 functional neuron names

A
  1. sensory/afferent
  2. interneurons
  3. efferent/motors
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11
Q

What is the functional classification of sensory/afferent neurons? (2)

A
  • mostly unipolar
  • from sensory receptors to CNS
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12
Q

What is the functional classification of interneurons? (3)

A
  • within CNS between sensory and motor
  • 99% of neurons
  • mostly multipolar
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13
Q

What is the functional classification of motor/efferent neurons? (2)

A

CNS to effectors
- all multipolar

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