Im not sure if I covered everything I need to say?
Define homeostasis, and identify and describe the role of each component of a typical feedback loop. (2.5 marks)
Homeostasis refers to the existence of a stable internal environment. Maintaining homeostasis by regulated events of the body systems is extremely vital to an organism’s survival. Homeostasis is essential for the survival of the cells, where cells make up body systems, where body systems maintain homeostasis. Additionally, failure to maintain homeostasis leads to illness or in some instances death. A few examples of factors of the internal environment that are maintained by homeostasis: regulation of body temperature, control of blood glucose levels, regulation of salt, electrolytes and water balance, concentration of O2 and CO2, and volume and pressure of the plasma.
Homeostatic control systems work to maintain the internal environment within certain limits or “set points” to maintain homeostasis in positive feedback mechanisms and enhance the stimulus in negative feedback mechanisms. A homeostatic control system consists of three components of a typical feedback loop: (1) a receptor, a sensor that is sensitive to a particular environmental change or stimulus; (2) a control center (or integration center), which receives and processes the information supplied by the receptor, and sends out commands; (3) an effector, a cell or organ that responds to the commands of the control center to either enhance or inhibit the stimulus There are two types of feedback systems: (1) Negative feedback and (2) Positive feedback.
Quick Reply
