PSYC 100 Lecture Notes - Lecture 3: Resting Potential, Morphine, Saltatory Conduction

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 100
• Professor: A.George Alder

Document Summary

The communication of information within and between neurons occurs in two stages. Conduction: movement of an electric signal within neurons, from the dendrites to the cell body, then throughout the axon. Transmission: movement of electric signals from one neuron to another over the synapse. Electric signaling: conducting information within a neuron: neuro(cid:374)"s (cid:272)ell (cid:373)e(cid:373)(cid:271)ra(cid:374)e has s(cid:373)all pores that a(cid:272)t as (cid:272)ha(cid:374)(cid:374)els to allo(cid:449) s(cid:373)all ele(cid:272)tri(cid:272)all(cid:455) (cid:272)harged molecules ions to flow in and out of the cell. Flo(cid:449) of io(cid:374)s a(cid:272)ross (cid:374)euro(cid:374)"s (cid:272)ell (cid:373)e(cid:373)(cid:271)rane = created conduction of an electric signal within the neuron. In resting potential = high concentration of + ions, k+, and charged protein ions, a- A(cid:272)tio(cid:374) pote(cid:374)tial: a(cid:374) ele(cid:272)tri(cid:272) sig(cid:374)al that is (cid:272)o(cid:374)du(cid:272)ted alo(cid:374)g the le(cid:374)gth of a (cid:374)euro(cid:374)"s a(cid:454)o(cid:374) to a. Electric impulse called action potential synapse: action potential only occurs if it reached a certain threshold. Below threshold: only tiny signals which dissipated quickly.