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bio ch 3
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what is energy
ability to perform work or to produce change
kinetic energy
energy of motion
potential energy
energy available to do work
energetics
how organisms take in, process, and expend energy
how organisms use energy to maintain order and life
heat
random movements of atoms and molecules
entropy
disorder and randomness in a system
reactants
the starting substances
products
the newly formed substances
energy-releasing reaction
give off energy, source-breaking/changing of chemical bonds
energy-absorbing reactions
take in energy and store it in new chemical bonds, most cellular reactions that maintain order
the power for a cell's energy-absorbing reaction comes from the ____________
cell's energy-releasing reactions
ATP
Adenosine Tri Phosphate
cellular energy carrying molecule
cells use ATP as _______
packaged amounts of energy
for all chemical reactions reactants are separated from products by an ____
energy barrier
activation energy
the energy required to overcome the barrier
enzymes
proteins that work to speed up reactions by lowering the energy barrier (catalyst)
Author
bramirez
ID
10942
Card Set
bio ch 3
Description
bio ch 3
Updated
2010-03-17T16:03:56Z
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