BMS 507 Study Guide - Final Guide: Adenosine Triphosphate, Ionic Bonding, Activation Energy
Document Summary
Homeostasis- all body systems working together to maintain a stable internal environment (seasaw) Positive feedback- response increases change of the stimulus, normal range lost ex: blood clotting. Negative feedback-response negates the stimulus, normal range achieved ex: fever. Atoms- the basic unit of a chemical element- makes up matter. Cations- (ionic bond) the electron donor loses one or more electrons and has a positive charge. Anions- (ionic bond) the electron acceptor gains the electrons and has a negative charge. Isotopes- specific version of an element based on its mass number. Stomach acid, adds hydrogen ions to a solution. Bases- (alkaline) ph higher than 7. 0 ex: oven cleaner, removes hydrogen ions from a solution. Buffers- neutralize either strong acid or strong base ph- concentration of hydrogen ions (h+) in a solution. Electrolytes- inorganic ions that conduct electricity in solution. Enzymes- protein catalysts that lower the activation energy of reactions ex: a+b=ab. Water- solubility, reactivity, high heat capacity, and lubrication (between body cavities)
