Homeostasis is the maintenance of a constant internal environment in response to a changing external environment. Hormones have an important role in this system. Hormones are made of proteins , they are released by glands into the bloodstream, where they reach target cells. A specific hormone will fit a specific receptor protein, and this brings about a change in that cell. Was this helpful? Yes No I need help.
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Cybernetics is a transdisciplinary  approach for exploring regulatory and purposive systems —their structures , constraints, and possibilities. The core concept of the discipline is circular causality or feedback —that is, where the outcomes of actions are taken as inputs for further action. Cybernetics is concerned with such processes however they are embodied,  including in environmental, technological, biological, cognitive, and social systems , and in the context of practical activities such as designing, learning, managing , and conversation. Cybernetics has its origins in the intersection of the fields of control systems , electrical network theory , mechanical engineering , logic modeling , evolutionary biology , neuroscience , anthropology , and psychology in the s, often attributed to the Macy Conferences.
David Hume , born May 7 [April 26, Old Style], , Edinburgh, Scotland—died August 25, , Edinburgh , Scottish philosopher, historian, economist, and essayist known especially for his philosophical empiricism and skepticism. He also wrote on political economy the Political Discourses , and history the multivolume History of England , — Hume conceived of philosophy as the inductive, experimental science of human nature. Taking the scientific method of the English physicist Sir Isaac Newton as his model and building on the epistemology of the English philosopher John Locke , Hume tried to describe how the mind works in acquiring what is called knowledge.
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