Nervous system

• What are the 7 parts of the nervous system?

  The nervous system, central NS, peripheral NS, automatic NS, somatic NS, sympathetic NS and parasympathetic NS
• What is the CNS?

  It is made up of the brain and spinal cord and includes the sensory, relay and motor neurons
• What is the peripheral nervous system?


  Connects the CNS to the rest of the body
• What is the automatic nervous system?


  Involved in unconscious behavior such as digestion
• What is the somatic nervous system?


  Involved in conscious behavior
• What is the sympathetic nervous system?


  Involved in the fight or flight
• What is the parasympathetic nervous system?


  involved in the rest and digest process
• What does the sensory neuron do?


  Transmits electrical impulses from receptors to the CNS
• What does the relay neuron do?


  Transmits electrical impulses between the sensory neuron and the motor neuron
• What does the motor neuron do?


  Transmits electrical impulses from the CNS to effectors
• Explain how the synaptic transmission occurs.

  The presynaptic neuron contains synaptic vesicles in the neurotransmitters which sends electrical impulses to the end of the neuron. When this happens the neuron releases neurotransmitters through the synaptic cleft via diffusion to the postsynaptic neuron. These bind to receptors which triggers an electric impulses which in turn causes a muscle contraction or hormonal releases
• What are excitatory neurotransmitters?


  Neurotransmitters that increase the likelihood of an action potential in the postsynaptic neuron
• What are inhibitory neurotransmitters?


  Neurotransmitters that decrease the likelihood of action potential in the postsynaptic neuron
• Label the synaptic transmission

  1.

  A) Synaptic cleft

  B) presynaptic membrane

  C) postsynaptic membrane

  D) Receptors

  E) Vesicles containing neurotransmitters