![]() ![]() Negative feedback mechanismsĪlmost all homeostatic control mechanisms are negative feedback mechanisms. It would then interact with the effector and travel down the efferent pathway, eventually making the person remove their hand from the scorching heat. The feeling of heat would travel through an afferent pathway to the central nervous system. For instance, if you felt scorching heat on your hand, the message would travel through afferent pathways to your central nervous system.Įfferent pathways– carry nerve impulses away from the central nervous system to effectors (muscles, glands). Here’s a few more definitions you may want to know.Īfferent pathways– carry nerve impulses into the central nervous system. ![]() Think of it as an extremely complex balancing act. Interactions among the elements of a homeostatic control system maintain stable internal conditions by using positive and negative feedback mechanisms. ![]() Response– a response from the effector balances out the original stimulus to maintain homeostasis.Output– information sent from the control center travels down the (efferent) pathway to the effector.The control center determines the appropriate response and course of action. Input– information travels along the (afferent) pathway to the control center.The receptor monitors the environment and responds to change (stimuli). Stimulus– produces a change to a variable (the factor being regulated).The image below is an example of how a homeostatic control system works. To maintain homeostasis, communication within the body is essential. A complex set of chemical, thermal, and neural factors interact in complex ways, both helping and hindering the body while it works to maintain homeostasis. Generally, the body is in homeostasis when its needs are met and its functioning properly.Įvery organ in the body contributes to homeostasis. The biological definition of homeostasis is “the tendency of an organism or cell to regulate its internal environment and maintain equilibrium, usually by a system of feedback controls, so as to stabilize health and functioning”. ![]()
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