The Most Interesting Topic I Studied

The most interesting topic I studied in school this year is Anatomy and Physiology. I already have the general understanding of how the human body works. But I did not fully comprehend how all of the intricate functions and how the systems of the human body work together to keep us healthy. What really fascinated me was our Homeostasis, the body’s natural tendency to maintain a stable internal environment (negative feedback and positive feedback). In many cases, stable conditions are maintained by negative feedback. In negative feedback, a sensing mechanism (a receptor) detects a change in conditions beyond specific limits. A control center, or integrator (often the brain), evaluates the changes and activates a second mechanism (an effector) to correct the condition; for example, cells that either remove or add glucose to the blood in an effort to maintain homeostasis are effectors. Conditions are constantly monitored by receptors and evaluated by the control center. When the control center determines that conditions have returned to normal, corrective action is discontinued. Thus, in negative feedback, the variant condition is canceled, or negated, so that conditions are returned to normal. Compare to positive feedback, in which an action intensifies a condition so that it is driven farther beyond normal limits. Such positive feedback is uncommon but does occur during blood clotting, childbirth (labor contractions), and lactation (where milk production increases in response to an increase in nursing).(www.cliffsnotes.com) Without Homeostasis our body would go crazy. Anatomy and Physiology introduces the structure and function of the human body. My knowolog of how the human body works, I would like to explore ways to discover curse for diseases.