Terms Glossary Flashcards
Absolute value
A bracket function that turns any value within its brackets positive; for example, |3 -5|= | -2|=2
Acid
A sour, corrosive chemical that ionizes in water to form H+ ions and has a ph of below 7.0
Adaptation
In evolution, a change in form brought about by a mutation that results In an advantage for a organism
Adjective
A word that modifies a noun or pronoun
Adverb
A word that modifies a verb, adjective, or another adverb
Allele
A from of a gene that codes for proteins that produce given traits
Amino acid
One of 20 small nitrogen-containing organic acids that serve as a building block for all proteins
Antecedent
In grammar the noun to which a pronoun refers
Antibody
A blood protein that is made by B cells to bind to foreign antigens that enter the body so they can be eliminated
Antigen
A toxin or foreign substance that produces an immune response in the body
Artery
A blood vessel that carries blood away from the heart
Atom
The fundamental unit of matter that makes up the 118 different elements, or forms of matter; An atom consist of a central nucleus containing protons, neutrons, and other outer electrons
Atomic mass
The mass of a single atom, usually expressed in atomic mass units (amu)
Atomic number
The number that identifies a particular element on the periodic table; it tells how many protons and electrons that atom has
Atomic radius
The distance from an atom’s nucleus to its outermost electron
atrium
One of the top chambers of the heart that receives blood from the body
Axon
The long thin, conductive part of the neuron that conducts impulses away from the neuron cell body
B- cells
A type of white blood cell that produces antibodies
Base
A chemical that produces OH -1 ions in solution, has a pH of greater than 7.0, and reacts with acids
Bases
One of the four “alphabet letters “ that make up the genetic code for DNA: A ( adenine) T ( thymine) C (cytosine) and G ( guanine)
Battery
An electrochemical cell; technically, a battery is more than one cell connected in series
Bias
A prejudice that is typically based on a faulty opinion
Biome
One of the earths major biological regions; for example grassland, tundra, or desert
Biotic
A factor in an ecosystem that is biological in origin such as plants animals fungus
Capillary
A very tiny blood vessel that can be either an artery or a vein
Cell
The basic biological unit of all living things
Cellular respiration
The process of cells burning oxygen to obtain energy and giving off carbon dioxide as waste product
Central nervous system
The part of the nervous system that includes the brain and spinal cord
Chemical change
A change in the composition of atoms or molecules as a result of a chemical reaction; for example, when H20 is broken into H 2 and O 2 , the composition of atoms has changed