2. Define Negative Feedback an example. a. How does your circulatory system help you lower your body temperature? Is this negative or positive feedback?

Negative feedback is a type of regulation in which a change in a system leads to a response that counteracts the initial change, bringing the system back to its original state or set point. This type of feedback helps maintain homeostasis in the body.<br /><br />An example of negative feedback is the regulation of body temperature. When the body temperature rises, the hypothalamus in the brain detects this change and initiates a response to cool the body down. This response includes vasodilation (widening of blood vessels) and sweating, which helps dissipate heat and lower the body temperature. Once the body temperature returns to its normal range, the hypothalamus stops stimulating these cooling mechanisms, and the body temperature remains stable.<br /><br />In the case of the circulatory system, it helps lower body temperature through negative feedback mechanisms. When the body temperature rises, the circulatory system responds by increasing blood flow to the skin and promoting sweating. This helps dissipate heat and lower the body temperature. Once the body temperature returns to its normal range, the circulatory system reduces blood flow to the skin and decreases sweating, allowing the body temperature to remain stable.