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Biology Exam 1


Atom The smallest particles of an element
Proton Positive Charge
Neutron Neutral Charge
Electron Negative Charge
Nucleus Center core of an atom
Atomic number identity of the element
Atom mass Mass of the atom of different element
Isotopes Same element that have the same number of protons but different numbers of neutrons
Energy Level a constant value of energy in the distribution of energies among a number of atomic particles
Intelligent Design intelligent entity
Panspermia outer space birth earth
Spontaneous nonliving matter
Valence Shell Outer shell of an atom
Ion an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons
Chemical bond an attraction between atoms that allows the formation of chemical substances that contain two or more atoms
Ionic bond A form when one atom gives up one or more electrons to another atom
Oxidation Any chemical reaction in which a material gives up electrons, as when the material combines with oxygen
Emergent Properties It's the property where living things become more and more complex as it goes from cellular level to organ system
Covalent bond A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms
Non-Polar covalent bond are a type of chemical bond where two atoms share a pair of electrons with each other
Polar covalent bond a type of chemical bond where a pair of electrons is unequally shared between two atoms
Hydrogen bond A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or fluorine atom, usually of another molecule
Passive transport A kind of transport by which ions or molecules move along a concentration gradient, which means movement from an area of higher concentration to an area of lower concentration
Diffusion the process whereby particles of liquids, gases, or solids intermingle as the result of their spontaneous movement caused by thermal agitation and in dissolved substances move from a region of higher to one of lower concentration
Osmosis the scientific process of transferring fluid between molecules
Facilitated diffusion the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins
Active transport The movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration
Endocytosis the transport of solid matter or liquid into a cell by means of a coated vacuole or vesicle (distinguished from exocytosis)
phagocytosis A process of a cell actively engulfing other cells or food particles
pinocytosis the uptake of fluid and dissolved substances by a cell by invagination and pinching off of the cell membrane
Receptor mediated endocytosis It means that inside of the cellular membrane there are specific proteins that are exposed to the fluids outside of the cell called the extracellular fluid
Exocytosis a process by which a cell transports secretory products through the cytoplasm to the plasma membrane
Created by: entrysam