PSYC 2 Study Guide - Growth Cone, Anterograde Amnesia, Reduced Affect Display
Document Summary
Unit 1: what structures/resources are necessary for keeping the neuron alive and healthy, nucleus contains the dna of the neuron, mitochondria are the sites of cellular respiration. Glucose + oxygen are needed: endoplasmic reticulum is a system of folded membranes. Rough er has ribosomes which play a role in synthesis of proteins. The electrical potential across the membrane is about -70mv, a result of the membrane being leaky to k+ ions. When the action potential is triggered by a stimulus, depolarization begins. Na+ channels open and na+ moves down the concentration gradient, making the inside of the cell positive and the outside negative. Afterward, the k+ channels open and na+ channels close, until inside becomes negative. Nak channels triggers opening of the next nak channel. In this way, the signal travels down the axon. The moving of negative charge = electrical signal: when the signal reaches the axon terminals, neurotransmitters are released from vesicles into the synapse.
