PSYCH261 Chapter 1.1:

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH261
• Professor: Daniel Smilek

Document Summary

Neurons and glia: ns has 2 types of cells, neurons and glia, neurons = receive info and transmit it to other cells, glia = have many functions. Shape varies from one neuron to another: have long branching extensions, tiniest neurons lack axons and some lack well-defined dendrites, motor neuron --> with its soma in spinal cord, receives excitation through its dendrites and. Large neurons have dendrites, soma (cell body), axon and presynaptic terminals conducts impulses along its axon to a muscle. Short outgrowths that increase the sa available for synapse. Interneuron --> cell"s dendrites and axons are entirely contained within a single structure. If a few of them are active at once, the astrocyte absorbs some of the chemicals they release. When the inhibition ceases, all of the axons are primed to respond again in synchrony. The blood-brain barrier: mechanism that excludes most chemicals from vertebrate brain.