PHS 3341 Lecture 4: CNS 1 - Rewritten

• School: University of Ottawa
• Department: Physiology
• Course: PHS 3341
• Professor: Stephen Gee

Document Summary

Composed of a cell body, dendrites (increase the sa to the receptive area) and the axon. A sensory neuron (afferent) doesn"t have dendrites, instead it has a peripheral ending that is similar, and convert energy and stimuli from the outside environment and send it to the cns. The portion of the a neuron where the cell graded potentials are converted action potential is the axon hillock. Communication is critical for the survival of the cells that compose the body. The ability of cells to communicate with one another is essential to the coordination of their diverse activities to maintain homeostasis. The central nervous system is composed of the. Nerve fibres that carry information between the cns and other parts of the body. Most of the cns is enclosed in hard bony tissue. Bathes and cushions the internal components of the brain.