PSYC1020 Lecture Notes - Lecture 3: Membrane Potential, Opiate, Acetylcholine
Document Summary
Neurons (for more info, see biol1040 notes: neurons: process info etc. Signalling o electrical signals (long distance) o chemical signals (short distance) Saltatory conduction: myelin sheath allows jumping of signal in nodes of ranvier repolarise (make it harder to reach ap) Nerve impulse summary: electrical signal starts in the presynaptic neuron and travels down the axon, to the presynaptic terminals, 2. Dendrites sum the effects of the different synaptic events: 3. If the result is a depolarization (an intracellular increase in the: concentration of positive ions) that exceeds the threshold of the neuron, an action potential is generated in a region called the axon hillock, 4. Action potential is conducted/ propagated along the axon: 5. Causes release of neurotransmitters at axon terminal into the synapse: 6. Neurotra(cid:374)s(cid:373)itter (cid:271)i(cid:374)ds to re(cid:272)eptors (cid:894) (cid:895) o(cid:374) postsy(cid:374)apti(cid:272) (cid:374)euro(cid:374)(cid:859)s de(cid:374)drites: 7. Triggers an ele(cid:272)tri(cid:272)al sig(cid:374)al i(cid:374) postsy(cid:374)apti(cid:272) (cid:374)euro(cid:374), a(cid:374)d so o(cid:374)
