PSY-P 101 Lecture Notes - Lecture 19: Semipermeable Membrane, Cell Membrane
Document Summary
Electro-chemical: overview: 2 parts, electrical: information moves along neuron (action potential or nerve impulse or neuron firing) (if you have a large group of neurons firing in an uncoordinated way, you will have a seizure) Chemical (chemicals known as neuro transmitters): information passes from neuron to neuron (synaptic transmission) (cid:894)s(cid:455)(cid:374)apse is the gap (cid:271)etwee(cid:374) (cid:374)euro(cid:374)s, (cid:374)euro(cid:374)s do(cid:374)"t tou(cid:272)h(cid:895: electrical: action potential (ap = nerve impulse) Electrical impulse = travels from dendrites to end of axon (terminal buttons). Shift in charge = causes ap: cell membrane. Ions (+) and (-) and they pass in/out of the membrane: membrane = semi-permeable. Neurons fire according to the all or none law: this means that if enough simulation reaches the neuron, it fires. But every time a neuron fires it fires with the same strength.
