PSYB65H3 Chapter Notes - Chapter 2: Internal Carotid Artery, Frontal Lobe, Middle Cerebral Artery
Document Summary
2 cells of the nervous system: neurons & glia. Neurons communicators; react and respond to stimuli - basis of behaviour - also learn & store info about their external behaviour. Neuron"s shape linked to its function: to receive, conduct, and transmit signals to collect info and send it on (or not) 3 main components: dendrites, soma, axon: dendrites receive incoming information from other neurons. 1 axon per neuron it is the information sender long thin, fiber/wire covered with myelin (insulation) helps to speed up transfer of info: terminal button at the end of the axon this releases neurotransmitter into. Presynaptic events that occur in the axon. Postsynaptic events that occur in the dendrites (of other neurons) Neuron is covered with a membrane plasma membrane. Consists of a bilayer of continuous sheets of phospholipids that separate 2 fluid environments one inside the cell (cytoplasm) and the other outside the cell.
