BIOL 2160 Lecture : Ch1 Notes
Document Summary
Chapter 1 what is physiology? form dictates function. how a molecule is shaped determines the job that it does phyiology (function) anatomy (structure. Levels of physiological organization cells (neurons, epithelial cells: molecules (atp, water, neurotransmitter receptor) organ systems (cardiovascular, gastrointestional) tissue (neurons, muscle) organs (heart, liver) organism. Four major cell/tissue types: neurons/nervous tissue (motor neurons, cortical interneurons). Specialized for sending and receiving info: muscle cells/muscle tissue (cardiac myocytes, skeletal muscle). Specialized for contractions; skeletal, smooth, cardiac: epithelial cells/tissue (intestinal epithelial cells). Found in organs, glands, and lining body cavities: connective tissue cells (bone cells, blood, skin, fat cells). Characterized by very few cells and lots of extracellular material. What does the body do? regulates exchange of molecules between internal and external environment. Homeostasis the ability to maintain a relatively stable internal environment despite fluctuations in the external environment. essential for survival and function of cells deviation from homeostasis indicates disease homeostasis is most often accomplished through negative feedback.
