PSYC1101 Lecture Notes - Lecture 3: Latrodectus, Threshold Potential, Neuroglia
Document Summary
Create sophisticated machines+tools cars, phones, robots, planes. Art, literature, music creativity ; don"t ful l maslows hierarchy or what we need but what we like/appreciate. Create cities social structures w societal roles. Bipolar neurons = 2 main extensions. connect other neutrons unipolar neurons = 1 short extension, branches into 2, 1 becomes dendrite and 1 axon. motor neurons = send messages to muscles or glands. Glial cells = surround and support neurons. manufacture nutrients and remove toxins and wastes. Outside neutron = mostlyna+ and some cl- some. At rest, the neutron is polarised due to the difference in charge. Neuron increases in positive charge as na+ ions ow in. (sodium channels open) Neuron decreases in charge after action potential as k+ ow out. (potassium channels open) Sodium potassium pump then actively restores the balance of na+ and k+ to their original locations in or out of the neutron. graded potentials = doesn"t reach threshold potential therefore no ring.