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Active transport

Energy-requiring process in which transports proteins bind with particles and move them through a cell membrane.

1

Diffusion

A type of passive transport in cells in which molecules move from areas where there are fewer of them.

2

Endocytosis

Process by which a cell takes in a substance by surrounding it with the cell membrane.

3

Enzyme

A type of protein that regulates nearly all chemical reactions in the body without being changed or used up itself.

4

Equilibrium

Occurs when molecules of one substance are spread evenly throughout another substance.

5

Exocytosis

Process by which vesicles release their contents outside the cell.

6

Fermentation

Process by which oxygen-lacking celled organisms release small amounts of energy from glucose molecules and produce wastes such as alcohol, carbon dioxide, lactic acid.

7

Inorganic compound

Compound, such as H2O, that is made from elements other than carbon and whose atoms usually can be arranged
in only one structure.

8

Metabolism

The total of all chemical reactions in an organism.

9

Mixture

A combination of substances in which the individual substances do not change or combine chemically but instead retain their own individual properties; can be gases, liquids, or any combination of them.

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Organic compound

Compounds that always contain hydrogen and carbon; carbohydrates, liquid, proteins, and nucleic acids are organic compounds found in living things.

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Osmosis

A type of passive transport that occurs when water diffuses through a cell membrane.

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Passive transport

Movement of substances through a cell membrane without the use of cellular energy; includes diffusion, osmosis, and facilitated diffusion.

13

Photosynthesis

Process by which plants and many other producers use light energy to produce a simple sugar from carbon dioxide and water and give off oxygen.

14

Respiration

Process by which producers and consumers release stored energy from food molecules; series of chemical reactions used to release energy stored in food molecules.