Considered to be the basic units of matter.
Composed of protons, electrons, and neutrons
The core of each atom in a nucleus composed of positivly charged protons and uncharged neutrons
The number of protons in the nucleus is an atom's __________
The number of protons and neutrons combined is the atom's _________
Electrons keep darting about within certain limits called orbitals. Each orbital implies that their electrons move around in elliptical orbits.
Orbitals are arranged into energy levels (shells) depending on their distance from the nucleus. The farther an orbital extends from the nucleus, the higher its energy level is.
Pure substances, composed of only one of more than a hundred types of atoms that exist in nature
Particles of matter that are composed of one of units called atoms
Anything that occuoies space and has mass. Including molecules and atoms.
A steroid lipid that combine with phospholipids. Also a starting point in making steroid hormones i.e. estrogen testosterone, and cortisone
Similar to triglycerides, but contain phosphorus. The "head" attracts water and the 2 fatty acid "tails" repel water
Lipids that bonds can be broken apart to yeild energy. Useful in storing energy.
Fats and oils
carbon and water compounds
Chemicals in the blood that maintain pH
Compunds that produce an excess of OH- ions (or a decrease in H+)
Compunds that produce an excess of H+ ions
Water disrupts the bonds in large molecules, causing them to be broken down into smaller molecules
Reactants combine only after two (H) atoms and an (O) atom are removed
When water is the solvent for a mixture of two or more kinds of molecules
Water is the most common solvent in which most other compounds are disolved
Few inorganic compounds have carbon atoms and none has C-C or C-H bonds
Compounds composed of molecules that contain (C-C) covalent bonds, (C-H) or both
Water Molecules form temporary attatchments
When atoms share electrons
Molecules that form ions when dissolved in water
Molecules dissolving in water
Forms between an atom that has only 1 or 2 electrons on the outermost level
Two or more elements bonded together
Plays on important energy-transfer role in the body.
Energy-transfer "battery" that picks up energy available to the cellular process
Are chemical catalysts
Help a chemical reaction occur, but are not reactants or products themselves. They participate in chemical reactions but are not changed by the recations
The basic building blocks of nucleic acids. Each nucleotide consists of a phosphate unit, a sugar, and a nitrogen base.
Lipid molecules formed by a glycerol until joined to three fatty acids. Their bonds can be broken apart to yeild energy.
A steroid lipid that combines with phospholipids in the cell membrane to help stabilize its bilayer structure
Bonds that string together and hold amino acids
Basic units that make up protines
Contain carbon, hydrogen, and 02 and nitrogen
Anterior torso below diaphragm
Have phosphorus containing units in them.
Forms a "head" that attracts water. Two "fatty acid" tails repel water.
This allows them to form a stable bilayer in water that forms the foundation for the cell membrane