2. Define Negative Feedback an example. a. How does your circulatory system help you lower your body temperature? Is this negative or positive feedback? b. How does insulin help maintain a constant blood glucose level?

Negative feedback is a type of regulation in which a change in a system causes a response that counteracts the initial change, bringing the system back to its original state. This process helps maintain homeostasis in the body.<br /><br />a. The circulatory system helps lower body temperature through a negative feedback mechanism. When the body temperature rises, the hypothalamus in the brain detects this change and triggers the sweat glands to produce sweat. As the sweat evaporates from the skin, it helps cool the body down. This response counteracts the initial increase in body temperature, bringing it back to the normal range. This is an example of negative feedback because the response (sweating) counteracts the initial change (increase in body temperature).<br /><br />b. Insulin helps maintain a constant blood glucose level through a negative feedback mechanism. When blood glucose levels rise after eating, the pancreas releases insulin. Insulin then signals the cells in the body to take up glucose from the bloodstream, lowering the blood glucose levels. This response counteracts the initial increase in blood glucose levels, bringing them back to the normal range. This is an example of negative feedback because the response (release of insulin) counteracts the initial change (increase in blood glucose levels).