HTHSCI 1H06 Lecture Notes - Lecture 1: Muscle Contraction, Homeostasis, Neuron
3 Feb 2020
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Describe how positive feedback loops help to expel a baby from the womb during labour and delivery. Ensure that you describe the components of a feedback loop and indicate which organs/structures act as these components in the example given above. Be sure to describe how the feedback loop is interrupted (i. e how a return to homeostasis is achieved). Homeostasis is the maintenance of relatively stable conditions in the body"s internal environment. The body can regulate its internal environment through feedback systems. Variables are parameters that are monitored and controlled or affected by the feedback system. Any disruption that changes a variable is called a stimulus. When a stimulus, or change in the environment, is present, feedback systems respond to keep systems functioning near a set point. Components of a feedback system includes receptors, a control center, and effectors. A receptor monitors changes in a variable and sends input to a control center.
