PSYC 211 Lecture Notes - Lecture 2: Nucleolus, Neuroglia, Myelin

• School: McGill University
• Department: Psychology
• Course: PSYC 211
• Professor: Yogita Chaudasama

Document Summary

Lecture 2: structure and function of cells in the ns. Soma, axon, dendrites, terminal buttons (release nts after ap), synapses. Bipoar neurons 2 processes leaving soma, transmit sensory info. Unipolar neurons 2 process from soma, axon divides into 2, touch, t, pain, other sensory affecting skin. Semi-permeable barrier btw blood and fluid that surrounds the cells of the brain. Provide balance btw subs within neurons and in the ecf. Membrane potentials difference in charge btw inside the axon and ecf. Electrostatic pressure attractive/repulsive forces btw the charges ions. Mp maintained by balance of diffusion and electrostatic forces (influenced by conc. of the fluids inside and outside the cell. Na-k transporters uses atp (mitochondria) exchange 3 na for 2 k (in) Sudden influx of na ions into the cell ap. Influx by transient increase in permeability of membrane to na transient permeability to k. Permeability provided by ion channels act as pores open or close.