PSY 324 Lecture Notes - Myelin, Axoplasmic Transport, Schwann Cell
15 Mar 2014
School
Department
Course
Professor
Document Summary
Nervous system is divided into two areas: cns, pns. Axon: action potential- signal that travels down it. Myelin sheath: insulates the axon and allow the action potential to travel through the axon effectively. Cajal (neuron theory): talked about the different shapes and varieties of cells. Cells connect in a directional manner (signal enters in through the dendrites, through the axon and out the terminal buttons) Grey matter- where the cells are found. Bipolar (has 2 processes-does not have a myelin sheath because it is not necessary for shorter connections), multipolar (multiple processes), pseudo- unipolar (has only one process) Plasma membrane: protects the inner cell, regulates molecules that enter and exit the cell. It is also selectively permeable- proteins embedded along the cell membrane. Cytoplasm: highly complex, always in movement, allows for different movements of particles, contains organelles, chemical reaction moves material from one side of the cell to another.
