Anatomy and Physiology 101 Final Exam Graded A+ Ivy Tech

What is the difference between anatomy and physiology - ANSWER-anatomy- study of structure physiology- study of function what are the levels of organization - ANSWER-subatomic particle- protons, electrons, neutrons atom molecule macromolecule organelle cell tissue organ organ system organism what are the characteristics of life? - ANSWER-movement responsiveness respiration absorption secretion digestion assimilation- changing of absorbed substances into chemically different forms circulation reproduction growth what are the requirements of life? - ANSWER-water food heat pressure oxygen define homeostasis - ANSWER-maintaining of a stable enviroment what is a homeostatic mechanism - ANSWER-monitors aspects of internal environment and corrects as needed *negative feedback mechanism define matter - ANSWER-anything that takes up space and has mass element - ANSWER-composed of chemically identical atoms atom - ANSWER-smallest particle of atom, basic unit of matter what are structure of an atom - ANSWER-nucleus protons neutron electrons define nucleus, proton, electron, neutron - ANSWER-nucleus- central part of atom proton- positive charge electron- negative charge neutron- no electrical charge ionic bond - ANSWER-formed when electrons are transferred from one atom to another what are covalent bonds - ANSWER-when two molecules share electron hydrogen bond - ANSWER-formed between water molecule, attraction between positive end of polar molecule and negative end of another polar molecule define synthesis, decomposition, and exchange reactions - ANSWER-Synthesis- A+B=AB Decomposition- AB=A+B exchange- AB+CD=AD+BC define reactant - ANSWER-starting materials of reactions product - ANSWER-ending material define catalyst - ANSWER-a substance that speeds up a chemical reaction what is an acid - ANSWER-dissociates with water base - ANSWER-combines in water what happens to salts when dissolved in water and what is produced? - ANSWER-The salt molecules are "torn apart" by the water, and are reduced to sodium (Na+) and chlorine (Cl-) ions. what is the pH scale? what ions are involved in the pH scale? - ANSWER-pH scale- indicated the concentration of hydrogen ions in a solution, H+ and OH- organic molecule - ANSWER-contains Carbon and hydrogen and dissolves in water. inorganic molecule - ANSWER-does not contain C and H and dissociates with water