Central NS

• what is a dendrite?

  left part of the nerve cell that receives messages
• Axon?

  right hand side of the nerve cell which conducts the impulse
• terminal buttons?

  end of the axon which impulses passes from one nerve cell to the next
• vesicles?

  membrane bound sac containing neurotransmitters
• lock and key mechanism

  receptors on a dendrite which are complementarily toa neurotransmitter
• in the process of synaptic transmission where is the axon terminal buttons

  on the pre-synaptic neurone
• what is a gap between nerve cells called?

  synapse
• action potential

  when dendrite of one neuron stimulates another neuron
• what happens when there is an action potential?

  vesicles containing neurotransmitters cone to axon terminals on pre-synaptic gap
• vesicles empty their neurotransmitters out into synapse how?

  vesicles fuse with the membrane and release the chemicals
• where do the neurotransmitters go to when released?

  the receptors on the post-synaptic neurone
• how does a message get sent?

  if the neurotransmitter fits the receptor via lock and key
• what happens after the message is sent

  neurotransmitters are reabsorbed into the pre-synaptic neurone
• what happens to excess neurotransmitter in the synapse?

  they are broken down by enzymes
• what happens after neurotransmitters reabsorbed?

  both neurone return to resting state
• what is the function of dopamine?

  posture and control of movement, dependency behaviour (addiction), cog function, emotions
• what is the role of serotonin?

  mood control, sleep and wakefulness, regulating body temperature
• what is the role of acetylcholine?

  stimulates muscle contraction, key motor skills, expression of anger and sexuality