NATS 1610 Lecture Notes - Lecture 3: Thermostat, Glucagon, Fluid Compartments
27 Oct 2015
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Nats 1610 lecture 3 the organization of the living body. Metabolism: sum of all chemical reactions in body, obtained and producing energy, making body structures. Responsiveness: ability to detect and respond to internal and external environments, to sense changes and react. Movement: motion of whole body individual organs, single cells, intracellular structures. Respiration: obtaining oxygen, removing carbon dioxide, releasing energy from food. Reproduction: formation of new cells for growth, repair, replacement, or production of a new individual, production of future generation. Life depends on 5 environmental factors: nutrients (food) Chemicals for energy and raw materials for cell and body formation. Includes carbohydrates, proteins, lipids, vitamins and minerals: oxygen. Required for chemical reactions, mostly to release energy from nutrients: water- 60-80% body weight. Regulates body temperature: heat- stable (37 degrees of celsius) partly controls metabolic rate of body, pressure, atmospheric pressure important for breathing and exchange of o2 and co2, hydrostatic pressure keeps blood flowing.
