S ensory neurons – receive signals ● A fferent neurons – A ccept signals ● M otor neurons – send signals ● E fferent neurons – signal E xits ● Interneurons – cells in spinal cord responsible for reflex loop CENTRAL NS Brain and spinal cord PERIPHERAL NS Rest of the NS o Somatic NS Voluntary movement oi bAutonomic NS Involuntary (heart, lungs, etc Sympathetic NS Arouses the body for fight/flight (generally activates sympathetic to you getting eaten by a tiger helps you runaway Parasympathetic NS established homeostasis after a sympathetic response (generally inhibits NEUROTRANSMITTERS (NT): Chemicals released in synaptic gap, received by neurons oi bGABA: Major inhibitory NT o Glutamat E : Major E xcitatory NT (get excited when seeing your mates! o Dopamine: Reward & movement oi bSerotonin: Moods and emotion oi bAcetylcholine (ACh): Memory oi bEpinephrine & Norepinephrine: sympathetic NS arousal oi bEndorphins: pain control oi bOxytocin: love and bonding Agonist:drug that mimics a NT Antagonist: drug that blocks a NT Reuptake: Unused NTs are taken backup into the sending neuron. SSRIs (selective serotonin reuptake inhibitors) block reuptake – treatment for depression
