BIOL 2160 : Test 1 Study Guide
Document Summary
This maintains conditions within a certain normal range, or dynamic constancy. Hot sweat (cools) : antagonistic: positive feedback moves conditions further away from a set point, the input and the output in a positive feedback loop are the same, example: uterine contractions during childbirth . Release of oxytocin causes the uterus to contract. This pushes the baby"s head against the cervix, activating stretch receptors that signal to the hypothalamus. This results in more oxytocin release, which results in stronger contractions. etc. etc: example: mosquito bite; when you itch, releases a hormone making it more itchy. 11 p+, 11 n, 11 e-: need to gain 7 or lose 1 loses electron becomes positive: example: chlorine. 17 p+, 18 n, 17 e-: needs to gain 1 or lose 7. An indication of how much positive charge is in the nucleus: assigned a numerical value, the higher the #, the more electronegative an atom is.
