Negative Feedback Mechanisms:
Effector acts to ______ the initial stimulus
Ex. Blood Sugar eat 4 donuts -> blood sugar ____ -> ____ released -> blood sugar ______ as well as the _____ level
Ex. Blood Pressure Blood Pressure low -> anti diuretic hormone increases -> go to the bathroom less -> retain water-> blood level goes up -> blood pressure goes up -> ADH goes up
Most homeostatic control mechanisms are _____ feedback mechanisms which control ______, ______, _____, _____, _____, _____
blood oxygen levels
carbon dioxide levels
Positive Feedback Mechanisms: Effector acts to ___ the initial stimulus.
Ex. Blood Clotting tear/break in blood vessel, exposes ______ -> ______ stick to these -> they release a chemical that attracts more of them to the damaged area -> the pileup and chemical release leads to _____
Ex. Birthing Process Baby's head pushes on the _____ -> stimulating pressure _____ -> causes brain to release ______ -> stimulates muscles of ______ to contract -> pressure on the ______ increases -> _____ levels go up -> frequencies of contractions go up, etc. -> baby is born
When the body is not able to maintain homeostasis.
Negative and Positive Effects on Stimulus
The results of the response then feed back to effect the stimulus, either reducing it (negative feedback) or enhancing it (positive feedback)