PS101 Lecture 3: Chapter 3
Document Summary
Pet scan: small dose of radioactive substance injected, radioactive substance emits positrons, different colours indicate different tissue, tissues differentially pick up the radioactive substance, measures brain function fmri, based on the amount of oxygen in the blood, uses magnets, measures activity in brain. Endocrine system: glands that secrete hormones into the bloodstream, some double function neurotransmitter, affect bodily functions, pituitary gland, major gland, impacts other glands, signals other glands to action (works with the hypothalamus) 4 f"s flight, fight, feed & fuck (mate, thyroid gland , hyperthyroidism nervous excitable, lots of energy , thin, hypothyroidism opposite of above, pancreas, regulates blood sugar levels, releases hormones insulin & glucagon, too little insulin diabetes (can"t break down sugars, too much insulin hypoglycemic ( low blood sugar, adrenal glands hormones activate the sympathetic nervous system, epinephrine and norepinephrine, also control salt balance, gonads enable reproduction, development of secondary sex characteristics (testosterone in book)
