PSYC 1100 Lecture Notes - Lecture 5: Basal Ganglia, Voltage-Gated Potassium Channel, Chlorpromazine

• School: UConn
• Department: Psychological Sciences
• Course: PSYC 1100
• Professor: John Salamone

Document Summary

They need something to activate it in order to open: enzymes: biological catalysts that promote chemical reactions; they synthesize transmitters and intracellular signals known as second messengers , transport mechanisms: pump substances across the membrane; e. g. sodium pump or. The positive na+ ions cannot get back in because na+ channels are closed. Anything that makes membrane more permeable to na+ will discharge" the sodium powered battery. Excitation results from increase in na+ influx into cell. Examples: epsps and ipsps are like ripples on the surface of a pond: propagation of action potentials, action potentials are not graded and not decremental, action potentials . Are all or none (they either fire, or they don"t) These inputs are integrated (i. e. , summed: over time (temporal summation) They convey information by their pattern and frequency: chemical transmission, neurotransmitter release is triggered by. The action potential, when it reaches the terminal, opens.