PSYCH261 Lecture Notes - Lecture 2: Multiple Sclerosis, Efferent Nerve Fiber, Saltatory Conduction

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH261
• Professor: Daniel Smilek

Document Summary

Neurons receive information and transmit it other cells. Glia serve many functions such as protection and increasing speed of action potentials. Surround synapses between neurons to shield it from chemicals circulating in the surroundings. Help guide the formation and elimination of synapses. Dilate blood vessels to bring in more nutrients to a speci c area. Remove water material, viruses, and fungi from the brain. Proliferate brain damage and in most brain diseases. Guide migration of neurons/axons/dendrites during embryonic development. After embryonic development most radial ganglia differentiate into neurons or other. Stained individual nerve cells with silver salts. Showed that nerve cells are separate instead of merging into one another. There are gaps in-between individual cells rather than being a joined continuous tissue. Plasma membrane separates internal and external environments and most chemicals such as water/o2/na+/k+/cl-/ca2+ require protein channels for controlled ow in and out. All cells except rbc have a nucleus this contains chromosomes (genetic info)