CNS

• Dopamine

  Rewards, motivation, pleasure, satisfaction. High levels - addiction, Low levels - schizophrenia
• Serotonin

  Regulates mood + sleep. High - focussed + stable, Low - depression + anxiety
• Norepinephrine

  Activates body + brain to take action during stress. High during fight/flight, low in sleep. High-high bp, sweating, Low-low energy, concentration, ADHD
• 1. CNS made of....responsible for...

  CNS is made up of the brain + spinal cord, responsible for communicating messages around the body​​
• 2. Nerve impulse, depolarises, release

  Nerve impulse travels down axon of presynaptic neurone, if enough energy is built up, it depolarises presynaptic neurone, stimulating vesicles to release neurotransmitters into the synaptic cleft
• 3. Diffuse, enough

  Neurotransmitters diffuse across the synapse, bind to receptors on post synaptic neurone​. Once enough receptors are stimulated the nerve impulse will pass on​
• 4. reuptake

  The remaining neurotransmitters in the synapse will get reabsorbed by reuptake pump on presynaptic neurone, stored in vesicles or destroyed