BIOL 2160 Chapter : Chapter 1 Notes Fall 2013
Document Summary
Physiology: the science of the normal function and *need notes* Control and regulate muscle contraction, gland secretion, sensory perception, thoughts, memory, emotions, and much more. Found connecting bones, in the heart, in other internal organs. Consists of a continuous, sheet-like layer of epithelial cells in combination with a thin underlying layer of non-cellular material (basement membrane) Separates body from external environment by a layer of epithelial tissue: lines hollow organs, forms glands. The body"s external environment: interior of body separated from external environment by a layer of epithelial tissue. Basal side: towards basement membrane and blood, bottom: lumen of respiratory system, gastrointestinal system, and urinary system are part of external environment. Exchange between external and internal environment: between blood and external environment. Kidneys: all exchange surfaces are only one cell thick. Body fluid compartments do not memorize amounts: internal environment = extracellular fluid (ecf, 70 kg man, 28 liters intracellular fluid (icf, 14 liters extracellular fluid (ecf)
