PSYC 1010 Lecture Notes - Lecture 2: Voltage-Gated Potassium Channel, Substantia Nigra, Latrodectus
Document Summary
If threshold is reached , action potential begins: a stimulus acts upon the neuron, voltage - gated na+ channels rapidly open. Each cell is connected to approximately 10,000 others. Synapse - the tiny spaces between neurons where chemical signals are transmitted. Reuptake ( brains version of recycling ) Agonist - a chemical substance that mimics or enhances the effects of a nt. Antagonist - blocks or reduces the effects of a nt. Glutamate - the main excitatory nt of the nervous system. Main inhibitory nt of the nervous system. Works in the brain and at a neuromuscular junction. Stimulates - heart muscle , intestines , and urogenital tract. Can be excitatory or inhibitory ( 15 different types of receptors ) Drugs , sex , and rock n roll. Block the pain signal in the brain. Pair bonding : a strong affinity that occurs between 2 animals. Found in 3% of species in nature.
