| A | B |
|---|
| acid | any substance that increases the H+ ion concentration of a solution |
| atom | smallest particle of an element that retains the properties of that element |
| base | any substance that decreases the H+ ion concentration of a solution |
| buffer | substance that minimizes changes in the concentrations of H+ and OH- ions in body fluids, maintains the constancy of pH |
| carbohydrate | Organic compound containing carbon, hydrogen,and oxygen, such as sugars and starches |
| covalent bond | chemical bond formed when atoms share electrons |
| electrolyte | substances that disociates in solution to form ions |
| element | substances that cannot be broken down into 2 or more different substances |
| enzymes | largest group of proteins |
| ion | atom that has become electrically charged by the loss or gain of electrons |
| ionic bond | chemical bond ormed when an atom donates an electron to another atom |
| lipid | water-insoluble organic biomolecule, fat and fatlike compounds |
| nucleic acid | polymer of nucleotids that make up DNA and RNA |
| protein | organic compound composed of amino acids |
