NATS 1610 Lecture Notes - Lecture 3: Positive Feedback, Blood Sugar, Hemostasis
13 Sep 2017
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Document Summary
Lecture 3 the organization of the living body. Metabolism (sum of all chemical reactions in body) Ability to detect & respond to internal & external environments. Motion of whole body, individual organs, single cells, intracellular structures. Obtaining oxygen; removing carbon dioxide; releasing energy from foods. Absorption - passage of substances through membranes and into body fluids. Assimilation - changing of absorbed substances into chemically different forms. Circulation - movement of substances in body fluids. Excretion - elimination of waste from metabolic reactions. Growth - increase in size and numbers of cells and intracellular structures. Differentiation - process whereby unspecialized cells become specialized. Formation of new cells for growth, repair, replacement, or production of a new individual. Chemicals for energy & raw materials for cell and body formation. Required for chemical reactions mostly to release energy from nutrients. Water 60 to 80% of body weight. Pressure application of force on an object. Atmospheric pressure important for breathing & exchange of o2/co2.
