Which 3 of the following are examples of feedback mechanisms which maintain homeostasis? a. antibodies binding to a virus b. flagellate rotation for a cell movement c. insulin secretion in response to high blood sugar d. increased heart rate in response to exercise e. protein synthesis f. proton pumping to maintain a proper ph level

The correct answer is-

C. Insulin secretion in response to high blood sugar.

D. Increased heart rate in response to exercise.

F. Proton pumping to maintain a proper pH level.

Homeostasis can be described as a tendency of living organisms to maintain a state of stable internal environment. In other words, it is the tendency to resist any change in the optimal conditions for survival.

It is brought by several regulatory mechanisms in the body such as regulation of body temperature, regulation of pH, regulation of osmolarity etc.

Thus, option C), D), and F) are the examples of feedback mechanisms  that help in maintaining homeostasis.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

this is a good question! i'll do some research and come back when i have the answer!