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8 Cards in this Set

  • Front
  • Back
What is the nervous system needed for?
To help to coordinate and body control the body
What is a receptor for?
An organ or body part that detects a change (stimulus) in the surroundings

Receptors:


Eyes




Ears




Skin




Tongue




Nose

Stimuli:


Light




Sound




Touch/pressure/pain




Taste




Smell

What is a neurone?

A specialised cell in the nervous system



Neurone:


Sensory




Relay




Motor

Function:


Send impulses from receptors in the sense organs to the CNS




The link sensory and motor neurones




Send impulses from the CNS to muscles and glands

Describe what happens in a reflex arc
Automatic response to a stimulus can bypass the CNS

Label the parts:


A-Receptors (reacts to a stimulus)


B-Sensory Neurone (carries message to the co-ordinator/CNS)


C-Relay Neurone Gaps between neurones are called SYNAPES


D-Motor Neurone (carries message away from co-ordinator/CNS)


E-Effector (a muscle or gland)


How does the nervous system transmit information in the body?
Via electrical signals- impules