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Understanding the Physiology of Health and Illness

The organisation of the nervous system

  • 3 things to know
  • AS 7

Overview

Overall function of the nervous system, two main divisions of the nervous system and sensory neurone and a motor neurone.

What you need to know

Answer each one before you reveal it.

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Key term

What is the overall function of the nervous system?

Key term

What are the two main divisions of the nervous system?

Key term

Which structures make up the central nervous system?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is the overall function of the nervous system?

    Model answer

    The nervous system detects changes inside and outside the body, processes that information and coordinates the body's response.

  2. 2

    What are the two main divisions of the nervous system?

    Model answer

    The nervous system divides into the central nervous system and the peripheral nervous system.

  3. 3

    Which structures make up the central nervous system?

    Model answer

    The central nervous system is made up of the brain and the spinal cord.

  4. 4

    What does the peripheral nervous system consist of?

    Model answer

    The peripheral nervous system consists of all the nerves running between the central nervous system and the rest of the body.

  5. 5

    Distinguish between a sensory neurone and a motor neurone.

    Model answer

    A sensory neurone carries impulses from receptors towards the central nervous system, and a motor neurone carries impulses from the central nervous system out to muscles and glands.

  6. 6

    What is a relay neurone?

    Model answer

    A relay neurone lies inside the central nervous system and connects a sensory neurone to a motor neurone.

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