PSYB65H3 Chapter Notes - Chapter 3: Railways Act 1921, Genetic Engineering, Dopaminergic
Document Summary
Chapter 3: what are the functional units of the nervous system. The core region is called the cell body, or soma. Neurons branching extensions, or dendrites, collect information from other cells. Its main root is the single axon (carries messages to other neurons: the neuron has only one axon and many dendrites, basic structure of a neuron: If fresh brain tissue is viewed new branches, losing old ones, and making and losing connections with each other: longevity, some behavior does depend on the production of new neurons. Cns neurons are with you for life and are never replaced. If the brain or spinal cord is damaged, the neurons that are lost are not replaced, the functional recovery is poor. In the peripheral nervous system and in some other species of animals, neurons can be lost and replaced. Structure and function of the neuron: surface area of the cell is increased immensely by its extensions into dendrites an an axon.
