PSYC 271 Chapter Notes - Chapter 4: Axon Terminal, Antidromic, Atropa Belladonna
6 Oct 2018
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Resting membrane potential: membrane potential- the difference in electrical charge between the inside and outside of a cell. In its resting state, with the -70mv charge built up across its membrane, a neuron is said to be polarized. Ions- like all salts in solution, the salts in neural tissue separate into positively and negatively charged particles. Sodium-potassium pump: ions in motion move down their concentration gradient, thus na+ will tend to enter and. K+ will tend to exit: the negative internal charge creates pressure for both na+ and k+ to enter, sodium-potassium pumps 3 na+ out for every 2 k+ they transport in. Transporters- mechanisms in the membrane of a cell that actively transport ions or molecules across the membrane. It is rapid- assumed to be instantaneous for most purposes: the transmission of epsps and ipsps is decremental- they decrease in amplitude as they travel through the neuron.
