BIOL 001 Lecture Notes - Lecture 16: Negative Feedback, Thermostat, Homeostasis
6 Aug 2020
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Document Summary
The steady state of physiological conditions in the body. Homeostasis is the basic characteristic of living things. Regulation (what we will focus on today) All living things regulate internal conditions in some way. Stimulus (detect a change in environment or internally. This response works to increase or reduce stimulus. Response to the stimulus reduces the stimulus. A (stimulus) > causes b (response) > the response will go back and increase or reduce the stimulus > stimulus a should go away as well as the response > back to homeostasis. A > triggers response b > response b will increase stimulus a to a more extreme state > stronger stimulus then leads a stronger response (keeps repeating over and over again) Negative feedback is much more common than positive feedback (fig 40. 8, fig 40. 17) Mechanisms depend on the environment and the type of organism. Living things may need [solute] > or < environment.
