The nervous system

Jack Willepotte
Mind Map by Jack Willepotte, updated more than 1 year ago
Jack Willepotte
Created by Jack Willepotte over 5 years ago
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Mind Map on The nervous system, created by Jack Willepotte on 03/02/2016.

Resource summary

The nervous system
  1. sense organs detect stimuli
    1. eyes, ears, tongue, nose and skin are sense organs
      1. all of these contain different receptors, these receptors are a group of cells that are sensitive to a certain stimulus
        1. they chang the stimulus energy(E.G light energy) into electrical impulses
          1. examples of stimulus: light, sound, pressure, touch, pain or temperature
            1. light receptor cells are like most animal cells
    2. Central Nervous system coordinates a response to detected stimulus
      1. CNS is sent all information from sense organs
        1. from which reflexes and actions are coordinated
          1. CNS is the brain and spinal cord ONLY
            1. instructions from the CNS are sent to the effectors which respond accordingly
              1. This can be a reflex for example, reflexes help prevent injury as its an automatic response
                1. Passage of information in a reflex is called a reflex arc.
          2. neurones(nerve cells) transmit information quickly as electrical impulses to and from the CNS
            1. The impulses movement
              1. receptors in sense organs: detect stimuli
                1. sensory neurones: nerve cells that carry signals as electrical impulses from receptor in sense organs to CNS
                  1. synapse
                    1. relay neurone: nerve cells that carry signals from sensory neurones to motor neurones
                      1. synapse
                        1. Motor neurones: nerve cells that carry signals from the CNS to the effector muscles or glands
                          1. glands respond by secreting(releasing) chemical substances
                      2. synapses connect neurones. the nerve signal arrives as electrical impulses then the signal is transferred by chemicals which diffuse across the gap, these chemicals then set off a new electrical charge in the next neurone
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