Nervous System

• What is the nervous system made up of?

  A complex network of cells called neurones
• 3 main types of neurones?

  sensory motor relay
• What do sensory neurones do?

  Transmit electrical impulses from receptors to the CNS
• What do motor neurones do?

  Transmit electrical impulses from the CNS to effectords
• What do relay neurones do?


  Transmit electrical impulses between sensory neurones and motor neurones
• What are electrical impulses also called?

  Nerve impulses, Action potentials
• What detects a stimulus?

  Receptor cells
• what happens after a stimuli is detected by receptor cells?

  An electrical impulse is sent along a sensory neurone
• What happens when an electrical impulse reaches the end of a neurone?

  Neurotransmitters take the information across to the next neurone, which then sends an electrical impulse
• Neurotransmitters are a type of what?

  Chemical
• What does the CNS do?

  The CNS (the COORDINATOR) processes the information and sends impulses along motor neurones to an EFFECTOR
• Give order of response?

  Stimulus

  receptors

  sensory neurone

  CNS

  motor neurone

  effector

  response
• What does CNS do?

  processes information
• What is the nervous system split into?

  2 different system
• what 2 different systems is the nervous system split into?

  CNS and Peripheral nervous system
• CNS stands for?


  central nervous system
• CNS comprises of what?

  brain and spinal cord
• What is the peripheral nervous system made up of ?

  The neurones that connect the CNS to the rest of the body
• what does the PNS (peripheral nervous system) have?

  2 different systems
• what 2 different systems does the PNS have?

  Somatic nervous system

  Autonomic nervous system
• what does the somatic nervous system do?


  Controls conscious activities eg running
• what does the autonomic nervous system di?


  control unconscious activities eg digestion
• what does the autonomic nervous system have?

  2 divisions that have opposite effects on the body:

  sympathetic, parasympathetic
• what does the sympathetic nervous system do?

  gets body ready for action

  fight or flight system
• what does the parasympathetic nervous system do?

  calms the body down

  rest and digest system