AP PSYCHOLOGY

Detailed explanation-1: -The control of blood sugar (glucose) by insulin is a good example of a negative feedback mechanism. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas) secretes insulin into the blood effectively lowering blood sugar levels.

Detailed explanation-2: -Insulin and glucagon work in what’s called a negative feedback loop. During this process, one event triggers another, which triggers another, and so on, to keep your blood sugar levels balanced.

Detailed explanation-3: -Another example of negative feedback is the regulation of the blood calcium level. The parathyroid glands secrete parathyroid hormone, which regulates the level of calcium in the blood. If calcium decreases, the parathyroid glands sense the decrease and secrete more parathyroid hormone.

Detailed explanation-4: -The glucose regulatory system is a classic negative feedback system (Fig. 5–8) maintaining glucose homeostasis. When blood glucose concentration increases after a perturbation, for example, a meal, an oral glucose tolerance test (OGTT) or an intravenous infusion of glucose, the pancreas beta-cells secrete more insulin.

Detailed explanation-5: -Example of a negative feedback loop in the endocrine system The hypothalamus produces thyroid-releasing hormone (TRH). This causes the anterior pituitary gland to produce thyroid-stimulating hormone (TSH), which causes the thyroid gland to produce thyroid hormones T3 and T4.