PSYC 2240 Chapter Notes -Active Transport, Multiple Sclerosis, Microglia
Document Summary
The nervous system is composed of two kinds of cells: neurons and glia. Only neurons transmit impulses from one location to another. The larger number of neurons have branches, known as axons and dendrites, which can change their branching pattern as a function of experience, age, and chemical influences. Many molecules in the bloodstream that can enter other body organs cannot enter the brain. Local neurons are small and do not have axons or action potentials. Instead, they convey information to nearby neurons by graded potentials. Know the main structures of neurons and the structural differences among neurons. Know the main types of glia and their functions. Be able to describe the advantages and disadvantages of the blood-brain barrier. Neurons receive information and transmit it to other cells. The brain, like the rest of the body, consists of individual cells.
