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A&P vocabulary
| Term | Definition |
|---|---|
| DNA - Deoxyribonucleic Acid | The nucleic acid found in all living cells carries the organism's hereditary information |
| RNA - Ribonucleic Acid | The nucleic acid that contains ribose; acts in the protein synthesis |
| Nucleic Acids | Class of organic molecules that includes RNA and DNA |
| Nucleotides | Building blocks of nucleic acids |
| Enzymes | Substances formed by living cells that act as a catalysts in bodily chemical reactions |
| Catalyst | A substance that increases the rate of a chemical reaction without becoming part of the product or being changed itself |
| Functional Proteins | Proteins that play crucial roles in virtually all biological processes = rather than just forming structures |
| Active Site | The specific region of an enzyme where a substrate binds and catalysis takes place or where chemical reaction occurs |
| Fibrous Proteins | A strandlike protein that appears most often in body structures. They are very important in binding structures together and for providing strength in certain body tissues |
| Structural Proteins | Typically long and thin, and hense the name FIBROUS ; water-insoluble |
| Globular Proteins | Spherical (globe-like) proteins ; somewhat water-soluble |
| Proteins | A complex nitrogenous substance; the main building material in cells |
| Amino Acids | Organic compound containing nitrogen, carbon, hydrogen, and oxygen; the building block of protein |
| Steroids | A specific group of chemical substances including certain hormones and cholesterol |
| Cholesterol | A steroid found in animal fats as well as in most body tissues; made by the liver |
| Omega-3 Fatty Acids | a class of essential fatty acids found in fish oils that acts to lower the levels of cholesterol and LDL in the blood |
| Phospholipids | A modified triglyceride containing phosphorus |
| Polyunsaturated | Of or relating to long-chain carbon compounds, especially fatty acids, having two or more double bonds between the carbon atoms. |
| Trans Fats | An unsaturated fatty acid molecule that contains a trans double bond between carbons atoms which makes the molecule kinked; also know as trans fatty acid |
| Glycerol | A sugar alcohol , one of the building blocks of fats |
| Saturated | Atoms are linked by single bonds |
| Neutral Fats | Produced by the dehydration synthesis of one or more fatty acids with an alcohol like glycerol |
| Fatty Acids | A building block of fats |
| Dehydration Synthesis | Process by which a larger molecule is synthesized from smaller ones by removal of water molecule at each site of bond formation |
| Disaccharide | A Double sugar; ex: sucrose and lactose |
| Glucose | The principal sugar in the blood; a monosaccharide |
| Buffers | Substances that help to stabilize the pH of a solution |
| Inorganic Compounds | A compound that lacks carbon (ex: water) |
| Water | A chemical compound that consists of two hydrogen atoms and one oxygen atom |
| Salt | Ionic compound that dissociates into charged particles (other than hydrogen or hydroxyl ions) when dissolved in water |
| Organic Compounds | A compound containing carbon (EX: proteins, carbohydrates, and fats) |
| Hydrolysis | The process in which water is used to split a substance into smaller particles |
| Polysaccharides | Literally means sugars; a polymer of linked monosaccharides (EX: starch and glycogen) |
| Mechanical Energy | Energy form directly involved in putting matter into motion |
| Radiant Energy | Energy of the electromagnetic spectrum, which includes heat, light, ultraviolet waves, infrared waves and other forms |
| Chemical Energy | Energy form stored in chemical bonds |
| Electrical Energy | Energy form resulting from the movement of charged particles |
| Radioactivity | The process of spontaneous decay seen in some of the heavier isotopes, during which particles or energy is emitted from the atomic nucleus; results in the atom becoming more stable |
| Molecules | A particle consisting of two or more atoms held together by chemical bonds |
| Kinetic Energy | Energy of motion |
| Potential Energy | Energy which an object has because of its position; stored energy |
| Lipids | Organic compound formed of carbon, hydrogen, and oxygen; ex: fats and cholesterol |
| Triglycerides | Compounds composed of fatty acids and glycerol; fats and oils also called neutral fats |
| Proton Acceptors | A base; a base is a negatively charged ion that will react with or accept a positively charged hydrogen ion. Since a hydrogen ion is a proton, the base is called ____________ |
| Neutralization Reaction | A chemical reaction that occurs between an acid and a base; |
| Electrolytes | A substance that breaks down into ions when in solution and is capable of conduction an electric current |
| Acids | A substance that liberates hydrogen ions when in an aqueous solution |
| Proton Donors | An acid; acids are substances that can donate ions to bases. Since a hydrogen atom is a proton and one electron, an ion is just a proton |
| Bases | A substance that accepts hydrogen ions; proton acceptor |
| Ions | An atom with a positive or negative electric charge |
| Covalent Bonds | A bond involving the sharing of electrons between atoms |
| Valence Shell | The outermost energy level of an atom that contains electrons; the electrons here determine the bonding behavior of the atom |
| Ionic Bonds | Bond formed by the complete transfer of electron(s) from one atom to another (or others). The resulting charged atoms, or ions, are oppositely charged and attract each other |
| Hydrogen Bonds | A weak bond in which a hydrogen atom forms a bridge between two electron-hungry atoms. An important intramolecular bond. |
| Synthesis Reactions | Chemical reaction in which larger molecules are formed from simpler ones. |
| Elements | Any of the building blocks of matter; EX: oxygen, hydrogen, carbon |
| Periodic Table | A table of the chemical elements arranged in order of atomic number so that elements with similar atomic structure appear in vertical columns |
| Isotopes | Different atomic form of the same element. Vary only in the number of neutrons they contain. |
| Radioisotopes | Isotope that exhibits radioactive behavior |
| Orbital Model | Depicts the general location of the electrons outside the nucleus as a haze of negative charge referred to as the electron cloud. |
| Atomic Number | The number of protons in an atom |
| Electrons | Negatively charged subatomic particle; orbits the atomic nucleus |
| Planetary Model | Miniature solar system where the protons and neutrons are clustered at the center of the atom in the atomic nucleus |
| Protons | Subatomic particle that bears a positive charge, located in the atomic nucleus |
| Neutrons | Uncharged subatomic particle found in the atomic nucleus |
| Atoms | The smallest part of an element; indivisible by ordinary chemical means |
| Atomic Symbol | A one- or two-letter symbol indicating a particular element |
| Matter | Anything that occupies space and has mass |
| Energy | The ability to do work |
| Atomic Mass | The number of protons and neutrons in the nucleus of an atom |
| Atomic Weight | The average of the mass numbers of all of the isotopes of an element |
| Adenosine Triphosphate (ATP) | The compound that is the important intracellular energy source; cellular energy |
| Adenosine Diphosphate (ADP) | an organic compound that is composed of adenosine and two phosphate groups; converts to ATP for the storage of energy during cell metabolism |
| Compound | Substance composed of two or more different elements, that atoms of which are chemically united |
| Electron Shells or Energy Levels | An orbit followed by electrons around an atom's nucleus |
| Unsaturated | A molecule that contains double or triple carbon-carbon bonds; |
| Monounsaturated | Of or relating to an organic compound, especially an oil or fatty acid, containing only one double or triple bond per molecule |
| Carbohydrates | Organic compound composed of carbon, hydrogen, and oxygen; includes starches, sugars, cellulose |
| Monosaccharide | Literally one sugar; the building block of carbohydrates; EX: glucose and fructose |
| Decomposition Reactions | A destructive chemical reaction in which complex substances are broken down into simpler ones |
| Exchange Reactions | A chemical reaction in which bonds are both made and broken; atoms become combined with different atoms |
| Unsaturated | Contains double or triple carbon-carbon bonds |
| pH | The symbol for hydrogen ion concentration; a measure of the relative acidity or alkalinity of a solution |
| Unsaturated Solution | A more dilute solution |
| Saturated Solution | A more concentrated solution |