Unit 3.6 Homeostatsis

dynamic equilibrium

constant small corrections that organisms make to maintain homeostasis

feedback loops

organisms maintain homeostasis through a series of feedback loops

negative feedback

slows or stops the stimulus to turn off the mechanism and return it to a normal state

positive feedback

enhances a stimulus and causes the reaction to continue or increase (ex: amount of sunlight)

negative feedback loops

reverse a reaction to return to normal state (ex: body temperature (feeling cold →normal/feeling hot → normal and blood sugar levels)

How are guard cells found on leaves negative feedback loops?

open and close pores to control amount of water released (too much heat would make them lose water, so they have to close); respond to environment conditions

positive feedback loops

continue to increase a reaction until a change occurs (ex: baby developing and wound clots)