PSY 1001 Lecture Notes - Lecture 3: Central Nervous System, Pituitary Gland, Myelin
Document Summary
And we will see that our behavior is also influenced in large part by the endocrine system, the chemical regulator of the body that consists of glands that secrete hormones. Pituitary gland: master gland, controls all other glands. Layers that protect brain: hair, scalp, skull, meninges (three layers) Cerebrospinal fluid (csf): cushions the brain, found in the meninges. Stop blood flow for 2 seconds: lose all glucose. Brain is vascular, needs a lot of blood. Resting potential: neuron"s charged up and ready to work. Action potential: cell discharges; always moves in same direction- dendrite to soma to axon. Node of ranvier: break in the myelin sheath of a nerve fiber. Synapses: small gap between neurons across which nerve impulses are transmitted. Neurotransmitter: chemical that relays signals across the synapses between neurons. Reuptake: process in which the neurotransmitters in the synapse are reabsorbed into the transmitting terminal buttons.
