PSL201Y1 Study Guide - Midterm Guide: Axon Hillock, Myelin, Electrochemical Gradient
Document Summary
Hydrophilic (e. g. , ions, glucose, amino acids, water) use membrane proteins for transport. Plasma: same as extracellular fluid plus blood cells, plus proteins. Isotonic = cells neither swell nor shrink when exposed to the solution. Hypotonic = more inside than outside, rushes out (water in) Hypertonic = more outside than inside, rushes in (water out) Lecture 2 neurophysiology i; nerve cells and electrical signaling. Responsible for everything we perceive, do, feel, and think. Functions to connect the cns to the organs (including limbs) Divided into the somatic and the autonomic nervous system. Axon hillock; where axon originates, and action potentials initiated. Piece of biological tissue; fatty white substance that surrounds the axon of some nerve cells, forming an electrically insulating layer. Essential for the proper functioning of the nervous system. It is an outgrowth of a type of glial cell. One oligodendrocyte forms several myelin sheathes and then myelinates sections of several axons.
