BIOL 2160 Chapter : Ch 1
Document Summary
Physiology vs. anatomy: physiology=function, anatomy=structure, form dictates function. How a molecule is shaped determines the job that it does. (key is shaped a certain way to fit lock) Levels of physiological organization: molecules (atp, water, neurotransmitter receptors, cells (neurons, epithelial cells) - smallest fundamental unit of life. Nothing that is living is smaller than 1 cell: classifying viruses causes controversy. Viruses are non living according to current definition because they have no cells. Virus is nucleic acid wrapped in protein: tissue (nervous tissue, muscle tissue, make up organs, organs (heart, liver, make up organ systems, organ systems (cardiovascular, gastrointestinal, organ systems working together make up organisms. Electrical impulses, chemical signals, main purpose is to communicate with other parts of the body: 2. Muscle cells/muscle tissue (cardiac myocytes, skeletal muscle, etc. ). Similar to nervous tissue because these cells don"t divide at adulthood.
