BIOM 2000 Study Guide - Midterm Guide: Diencephalon, Saltatory Conduction, Axon Terminal
6 Dec 2016
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Document Summary
The body communicates through neural and hormonal control systems: receptor (sensor + integrator) Responds to changes in the environment (stimuli) Sends information to control center: control center. Provides a means for response to the stimulus. Includes most homeostatic control mechanisms: shuts off the original stimulus, or reduces its intensity, works like a household thermostat. Positive feedback: when we need to destroy or get rid of something. Increases the original stimulus to push the variable farther. In the body this only occurs in blood clotting, before ovulation, and during the birth of a baby, ejaculation. 96% of the body is made from four elements: carbon (c, oxygen (o, hydrogen (h, nitrogen (n) Inorganic compounds: lack carbon, tend to be simpler compounds. Include water, salts, and some acids and bases. Skeletal structure: most are covalently bonded. Water: most abundant inorganic compound in the body.
