BIOLOGY 173 Lecture Notes - Lecture 2: Insulin, Homeostasis, Baroreceptor
1 Sep 2016
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Document Summary
Parameters maintained by the body to keep it in homeostasis: Keeping all of these parameters along with hundreds of others in check is a very difficult task. Your body is constantly being subjected to stress. Stress is any changes in the internal or external environment. Regulation of these parameters occur in one of two ways: negative feedback or positive. Negative feedback the initial stress and the final response are controlled in the opposite direction: ex. Sally is told that she is having a pop quiz and her blood pressure increases. A receptor (specifically the baroreceptors) detects stress and send a signal along a nerve to the control center (brain, specifically the medulla). The brain sends another signal along a nerve to an effector which produces a response in this case the blood vessels dilate so sally"s blood pressure decreases. Positive feedback the initial stress and the final response are in the same direction: ex.
