the nervous system Flashcards

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1
Q

Describe the sensory neurone

A
  • Relays messages along sensory neurone.

- Stimulus is detected by receptor cell which then sends the message to the central nervous system.

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2
Q

Define relay neurone

A

Carry messages to one part of the central nervous system to another.

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3
Q

Describe motor neurone.

A

Send messages from central nervous system via motor neurones to generate a response.

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4
Q

What do the dendrites do?

A

Receives signals from receptor cells.

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5
Q

What does the cell body do?

A

Contains the nucleus which controls the function of the cell.

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6
Q

What does the axon do?

A

Transmits nerve impulses away from cell body.

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7
Q

Describe a synapse.

A
  • Within the axon terminals there are vesicles.
  • The vesicles contain neurotransmitters.
  • The neurotransmitters travel across the gap and binds with the dendrite of the other neurone.
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8
Q

What is a reflex arc?

A

The pathway through the body that brings about a reflex action.

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9
Q

How does a reflex arc work?

A

receptor → sensory neurone → relay neurone → motor neurone → effector

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