PSYC 100 Lecture Notes - Lecture 3: Neuroglia, Neuropsychological Test, Resting Potential

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 100
• Professor: Russell Day

Document Summary

Neurons: basic building blocks of the nervous system, cell body (soma) Biochemical structures needed to keep neuron alive. Nucleus carries the genetic info that determines how the cell develops and functions: dendrites. Antennas that collect messages from neurons and send them to cell body: axon. At rest, has electrical resting potential due to distribution of + and charged chemicals inside and outside neuron: 2. Fatty, whitish insulation layer derived from glial cells. Most commonly found in nervous systems of higher animals. Not completely formed until some time after birth. Depolarize: excite the postsynaptic membrane by stimulating flow of ions. Hyperpolarize: makes membrane even more negative (-72) More difficult to depolarize and is inhibitory in their function: under production of ach (acetylcholine) is an important factor in. Nervous system: sensory neurons carry input messages from organs to brain, motor neurons transmit output impulses from brain to body, interneurons outnumber sensory and motor neurons, perform connective functions within nervous system.