01:119:116 Lecture Notes - Lecture 19: Axon Hillock, Efferent Nerve Fiber, Membrane Potential
25 Jul 2017
School
Department
Course
Professor
Document Summary
Membrane potential: seq, iov generating mp, c/c, iov changes to mp. Conduction of aps: c/c, seq, iov continuous and saltitory conduction. Various shapes, sizes share basic characteristics. Cell body contains all the organelles (nucleus, er, golgi, etc. ) 2 types of cytoplasmic extensions: (1) dendrites ( tree ) receive information. Usually many short dendrites (2) axon passes signal to another neuron and effector. Axon hillock base of axon; where signals are generated. Often branched at end leads to stronger signals. Nerve unit made up of axons of many neurons held together with connective tissue. Polarized difference in charge on either side. Membrane potential has potential to do work. Mitochondria generates proton gradient a type of membrane potential that does work and generates atp. Cells that can rapidly change membrane potential. Mp of cells at rest (not excited) Negative because there"s a more positive charge on outside than inside. Na+/k+ pump (3 na+ out, 2 k+ in imbalance)
