B.10.C analyze the levels of organization in biological B.11.A describe the role of internal feedback mechanisms in the maintenance of homeostasis systems and relate the levels to each other and to the whole system In negative feedback the body responds to an extreme condition by reversing the current direction of change. Example: Maintaining stable blood glucose levels Low blood releases glucose into sugar… pancreas releases glucagon… liver normal blood sugar obtained blood… High blood releases cells take glucose from sugar… pancreas insulin… fat normal blood sugar obtained blood… Example: Maintaining stable body temperature High body blood vessels dilate and sweat glands secrete temperature… body temperature returns to normal sweat… Low body blood vessels constrict and muscles temperature… contract… body temperature returns to normal In positive feedback the body responds to an extreme condition by promoting the current direction of change. Example: Giving birth Oxytocin is continuously secreted to stimulate uterine contractions.
B.10.C analyze the levels of organization in biological systems and relate the levels to each other and to the whole system B.11.A describe the role of internal feedback mechanisms in the maintenance of homeostasis In negative feedback the body responds to an extreme condition by reversing the current direction of change. Example: Maintaining stable blood glucose levels Low blood sugar… pancreas releases glucagon… liver releases glucose into blood… normal blood sugar obtained High blood sugar… pancreas releases insulin… fat cells take glucose from blood… normal blood sugar obtained Example: Maintaining stable body temperature High body temperature… blood vessels dilate and sweat glands secrete sweat… body temperature returns to normal Low body temperature… blood vessels constrict and muscles contract… body temperature returns to normal In positive feedback the body responds to an extreme condition by promoting the current direction of change. Example: Giving birth Oxytocin is continuously secreted to stimulate uterine contractions.
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