BIOL-1030 Lecture 2: Unit 2
Document Summary
*s, cl, k moving across neuron membrane to carry impulses and involved in osmoregulation. *trace elements: fe important component of hemoglobin (transports oxygen in the blood) Iodine helps thyroid function: fluorine prevents tooth decay. Compounds, molecules, and formulas: compounds, substances consisting of two or more elements that are chemically combined in a fixed ratio, have physical properties that differ from their component elements b. i. Nacl table salt: molecules, smallest part of a compound that still has properties of that compound, formulas a. Indicate the numbers of each kin of atom in a molecule. Atoms: smallest unit of matter that maintain properties of element. Isotopes = same # of protons but different # of neutrons. Radioactivity: emits radiation (either harmful or helpful, unstable isotope. Ionizing radiation is given off as decay occurs: electron given off = beta particle a. i. Covalent bonds shared pair of electrons (strongest form of bond) Ionic bonds electrostatic attractions between oppositely charged ions.
