BIO 102 Lecture Notes - Lecture 7: Basement Membrane, Extracellular Fluid, Blood Vessel

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Most cells of the body maintain an almost constant temperature. Body is constantly adjusting to internal and external conditions. Temp, water and salt concentrations, glucose concentrations, ph, hormone secretion, The hydrogen bonds that maintain the three dimensional structure of the protein can be disrupted by an oxygen and carbon dioxide concentrations environment that is too hot, too salty, too acidic, or too basic. Animals are classified according to their major source of body warmth: Ectotherms - derive body heat from the environment. Many cool down and become inactive at night, conserving energy. Endotherms - generate most of their heat through metabolic reactions. Maintain a constant body temp between 95* and 106*f. The energy required to maintain a high body temperature. Negative feedback system - counteract the effects of changes in the internal environment - principally responsible for maintaining homeostasis. Return of the system to its original condition. Control center - compares it to a set point.

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