Neuroscience: Neuron Classifications

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Questions and Answers

What is the structural classification of neurons?

What neuron looks like.

What is multipolar?

  • Bringing information towards the nervous system
  • Many processes off of the cell body; majority (correct)
  • One process coming off of cell body; then splits
  • One axon; one dendrite; found in special senses

What is bipolar?

  • Bringing information away from the nervous system
  • One process coming off of cell body; then splits
  • Many processes off of the cell body; majority
  • One axon; one dendrite; found in special senses (correct)

What is unipolar?

<p>One process coming off of cell body; then splits (B)</p> Signup and view all the answers

What is the functional classification of neurons?

<p>What neuron does.</p> Signup and view all the answers

What are sensory neurons?

<p>Bringing information towards the nervous system (C)</p> Signup and view all the answers

What are motor neurons?

<p>Bringing information away from the nervous system (A)</p> Signup and view all the answers

What are interneurons?

<p>Between sensory division and motor division; all in CNS (C)</p> Signup and view all the answers

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Study Notes

Structural Classification of Neurons

  • Refers to the physical appearance of a neuron.
  • Three main types: multipolar, bipolar, and unipolar.

Multipolar Neurons

  • Characterized by multiple processes extending from the cell body.
  • Most common type of neuron in the nervous system.

Bipolar Neurons

  • Composed of one axon and one dendrite.
  • Primarily found in special sensory organs, such as the retina of the eye.

Unipolar Neurons

  • Have a single process that branches out from the cell body.
  • Commonly found in sensory neurons that transmit information to the CNS.

Functional Classification of Neurons

  • Focuses on the role of the neuron in the nervous system.
  • Main classifications include sensory, motor, and interneurons.

Sensory Neurons

  • Also known as afferent neurons.
  • Responsible for transmitting sensory information toward the central nervous system.

Motor Neurons

  • Referred to as efferent neurons.
  • Carry signals away from the central nervous system to execute actions based on sensory input.

Interneurons

  • Located between sensory and motor divisions.
  • Found exclusively in the central nervous system and make up about 99% of all neurons.

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