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ANATOMY-set 2
set 2
17
Anatomy
Undergraduate 1
02/10/2009

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Term
oxidation
Definition
loss of an electron. may happen during some chemical reaction
Term
reduction
Definition
gain of an electron. may happen during some chemical reaction
Term
molecule
Definition
refers to a group of atoms held together by energy in a stable association
Term
compound
Definition
composed of two or more different types of atoms bond together
Term
ionic bonds
Definition
are formed because ions of opposite charge attract one another
Term
covalent bond
Definition
are formed when two or more atoms share pairs of valence electrons
Term
hydrogen bond
Definition
attractive force between the hydrogen attatched to an electronegative atom of one molecule and an electronegative atom of a different molecule.

---easiest to make, easiest to break
Term
energy
Definition
the power to do work
Term
work
Definition
a change in mass or distance
Term
activation energy
Definition
chemical reactions in cells cannot start without help. gets the reaction started
Term
exergonic rxns
Definition
produce more energy than they use
Term
endergonic rxns
Definition
use more energy than they produce
Term
organic molecule
Definition
molecules based on carbon and hydrogen
Term
inorganic
Definition
molecules not based on carbon and hydrogen
Term
nutrients
Definition
essential molecules obtained from food
Term
somatic cells
Definition
all body cells except sex cells
Term
phospholipid bilayer
*hydrophillic heads-toward watery environment, both sides
*hydrophobic fatty-acid tails-inside membrane barrier to ions and water soluble compounds
Definition
double layer of phospholipid molecules
*2 characteristics
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