PSYC101 Lecture Notes - Lecture 2: Voltmeter, Electric Potential, Resting Potential
Document Summary
The nervous system and its role in behaviour. A nerve is a bundle of nerve fibres or axons, axons are part of nerve cells or neurons. Microscope, looking for golgi stains in in nerve tissues. Connections to communicate, postulated neurons performed sensory integration. Synapse can communicate with other nerve cells, receives info from dendrites. Moment voltmeter inserted -7mvs is read, hence small electric potential, and action potential changes. Action potential is a rapid rise from the resting potential (~70mv) to a peak of ~ This travels along the axon, as a cascade of opening and closing of ion channels, like a domino effect. Travel speeds of 1 up to 200m/s (800km/hr) Action potential open voltage gated ca+ channels. Increased ca+ lets synaptic vesicles fuse with terminal membrane. Ach, dopamine etc is released into the cleft. Binds on ligand gated ion channels i. e na+ Voltage sensitive channels open, via action potential. Esps, isps makes cell potential more than it already was.
