homeostasis Flashcards
homeostasis
maintain a stable interrnal condition
when outside normal homestasis range it means
something is going on (disease)
negative feedback loop
end product regualte the start of a product/
ability to detect change and enact mechs to resist
dynamic equil
small fluctuation about a set point
neg feedback example (laying down)
laying down, stand up, bp falls, sends stimulus to brain, brain raises blood pressure by making heart beat faster
effector
carries out the final corrective action in neg feedback
sensor
detects and responds to change
intrinsic reg
cells in the organ that sense change and singal
extrinsic reg
the brain regualte organ using endocrine, nerv system,
auto regulation
neg feedback ex (hormone) hi glucose
pancreas detects glucose up, secretes insulin, cells take up more glucose, liver takes it up and stores as glycogin
neg feedback ex (hormone) low glucose
pancreas detect low insulin and release glucagon, liver breaks down glycogen into glucose
negative feedback is
antagonistic
positive feedback
will increase somthing
positive feedback ex
labor, more pushing means more oxytocin will release
also blod clottin
gradient
diff bn one point and another, will drive a process, will flow down
electric gradient
gradient of charges
thermal gradient
gradient of temp, will constrict blood cells to release heat
how is homeostasis maintained
negative feedback
