PSYC 1000 Chapter Notes -Adrenal Gland, Outlast, Pituitary Gland
2 Jun 2012
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Textbook: psychology tenth edition in modules authored by david g. myers. Why are psychologists concerned with human biology: german physician franz gall proposed phrenology (studying bumps on skull); britain had 29 phrenology societies at one time. Localization of function the idea that various brain regions have particular functions. They share a focus on the links between biology and behaviour phrenology faded because it had no scientific basis. Skull bumps don"t reveal mental traits and abilities. Fluid outside an axon"s membrane mostly positively charged ions. Neuron"s chemistry-to-electricity process, ions (positively charged atoms) are exchanged. Resting axon"s fluid interior has mostly negatively charged ions. This positive-outside/negative-inside state is called the resting potential: neuron fires security parameters change. First section of axon opens its gates; positively charged sodium ions flood through cell membrane depolarizes that section, causing another axon channel to open, and then another, etc. Most signals are excitatory, and some are inhibitory.
