Maintaining Dynamic Homeostasis
A group of scientists in the AP Biology Development Committee have used their knowledge, discovered, and written down new AP Biology Principles that explains and guides you through biologically systems and how living things function. One principle states: Organisms use feedback mechanisms to regulate growth and reproduction, and to maintain dynamic homeostasis. In order to understand this biology principle, you must understand the operation of the feedback system, and how it is used to regulate growth, reproduction, and to maintain dynamic homeostasis. The feedback system first consists of a sensor that receives the signal, which the signal then goes to a control center where information is processed, creating a response, and then lastly, it is sent out to the effector pathway where it will perform the response (eNotes). The purpose of the feedback system is to regulate growth, reproduction, and to maintain dynamic homeostasis. Homeostasis is defined as “stability of the body's internal environment, achieved by a system of integrated control systems activated by feedback systems...in response to changes occurring in a) the conditions of the external environment and b) the conditions of the internal body environment.”(eNotes) The term “dynamic” is used to describe homeostasis as a constant changed activity, because the body must experience a dynamic in order to maintain homeostasis. With this being said, the feedback system is in complete control of your body; controlling the levels of gases, nutrients, hormones, and chemical substances. Using feedback mechanisms, the system has full regulation of your growth and reproduction in your body (eNotes). There can be two different effect of the feedback control--negative or positive. In a negative feedback, resulting from a high amount of a product, the activity of the system has to reduce speed or slow down. For example, an increase in breathing would cause an increase in the...
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