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introduction a & p


Negitive feedback stimulus produces a response that OPPOSES OR STOPS original stimulus (temp.,blood sugar, most systems)
Positive feedback stimulus produces a response that INCREASES OR ENHANCES original stimulus (childbirth, blood clotting)
Dynamic Equilibrium body is continually adapting and adjusting (meds -> side effects)
Receptor senses a change in a particular stimulus
Control system receives and processes info from receptor ,directs change
Effector responds to command, can oppose or enhance stimulus
Homeostasis maintain a stable internal environment (body does not fuction in normal limits organ systems malfuction)
Nervous reacts quicker specific (phone call)
Endocrine reacts slower, wide lasts long (mail 1000 post cards)
autoregulation cell system adjusts its activities automatically
extrinsic regulation nervous or endocrine system causes change in activities
Created by: byorgey