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Cell: energy from food
How the cell gets energy from food
21
Biology
10th Grade
01/08/2009

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Term
Autotroph
Definition
organism that makes its own food
Term
Photosynthesis
Definition
process by which plants use the sun's energy to convert water and carbon dioxide into sugars
Term
Producer
Definition
organism that makes its own food (autotroph)and produces organic molecules that serve as food for other organisms in its ecosystem
Term
Heterotroph
Definition
organism that obtains food by eating other organisms
Term
Consumer
Definition
organism that obtains food by eating producers (autotrophs) or other consumers
Term
Cellular respiration
Definition
chemical process that uses oxygen to convert chemical energy stored in organic molecules into ATP (adenosine triphosphate)
Term
Kinetic energy
Definition
energy of motion
Term
Potential energy
Definition
energy stored due to an object's position or arrangement
Term
Activation Energy
Definition
minimum amount of energy required to trigger a chemical reaction
Term
Thermal energy
Definition
total amount of energy associated with the random movement of atoms and molecules in a sample of matter
Term
Chemical energy
Definition
potential to perform work due to the arrangement of atoms within molecules
Term
Calorie
Definition
amount of energy required to raise the temperature of 1 g of water 1 degree C
Term
ATP
Definition
(adenosine triphosphate) main energy source that cells use for most of their work
Term
Aerobic
Definition
requiring oxygen
Term
Electron transport chain
Definition
sequence of electron carrier molecules that transfer electrons and release energy during cellular respiration
Term
Metabolism
Definition
all of a cell's chemical processes
Term
Glycolysis
Definition
the splitting in half of a glucose molecule; the first stage of cellular respiration and fermentation
Term
Krebs cycle
Definition
stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide, releasing energy
Term
ATP synthase
Definition
protein structure in cell mitochondria that uses energy from H+ ions to convert ADP to ATP
Term
Fermentation
Definition
cellular process of making ATP without oxygen
Term
Anaerobic
Definition
without oxygen
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