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The Nervous System (reflex actions (is an involuntary action, e.g.…

- - - - hair like things that branch off the cell body and receive messages from other neurons
    - - contains the nucleus
    - - transports impulses through to the axon terminal
    - - passes the messages on to other neurons by releasing neurotransmitter which are pick up by the next neurons dendrites
    - - a sheet of fat covering the axon to conduct electricity from impulses
    - - the gaop between neurons
  - - - carry messages from the CNS to effectors
    - - transmit messages between neurons in the CNS
    - - have specialised receptors, which are sensitive to stimuli. They carry messages to the brain and spinal cord from cells in the sense organs.
- - - - left cerebral hemisphere
        
        more control over logical thinking and logic
        
        controls the right side of your body
      - right cerebral hemisphere
        
        more control over creativity and emotion
        
        control the left side of the body
    - - located at the base of cerebrum where your skull curves inwards
    - - the brain sem or Medulla can be seen where the spinal cord widens just as it passes into the skull
      - spinal cord is surrounded in bony structures called vertebae
      - a covering bone known as the cranium protects the brain and spinal cord
      - spinal cord and brain are surounded in a fluid called cerebrospinalfluid (CSF), which provided nutrients to neurons and acts as a shock absorber
  - - - occupies 80% of the brain and contains over 10 billion neurons
      - were higher intellectual functions take place
      - controls your conscious thoughs and voluntary movements
      - receives sensory messages from all body parts
      - controls and regulates body functions
    - - responsible for coordination and balance
    - - it controlls breathing, blood pressure and heart rate
- - - - made up of the brain and spinal cord. receives information from all over the body, processes the information, and then sends out messages telling the body how how to respond
    - - made up of the nerves that carry to and from the CNS