APK 3110C Midterm: Exam 2 Study Guide

• School: University of Florida
• Department: Applied Physiology and Kinesiology
• Course: APK 3110C
• Professor: Stephen Dodd

Document Summary

Synapses contact points between an axon of one neuron and the dendrite of another neuron. Shwann cells the cell that surrounds peripheral nerve fibers, forming the myelin sheath: gaps between myelin segments alon axon are called nodes of ranvier and play important role in neaural transmission. Latger diameter of acon greater the speed of neural transmission: damage to myelin is basis for neurological disease. 2: multiple sclerosis and nervous system function, neruological disease that destroys myelin sheaths of axons, has genetic component, due to immune attack on myelin, results in progressive loss of nervous system function. Fatigue, muscle weakness, poor motor control, loss of balance,mental depression: exercise can improve functional capacity. Electrical activity in neurons: resting membrane potential at rest, the neurons are negatively charged, determined by concentrations of ions (na+, k+, cl-) across membrane, action potential occurs when depolarization reaches threshold.