Examlex
Allows materials to pass into and out of the cell:
Product
An item or substance that is manufactured or refined for sale.
Enzymes
Biological catalysts that speed up chemical reactions in cells, thus playing a critical role in metabolism.
Humans
A species of bipedal primates, scientifically known as Homo sapiens, characterized by advanced brain development, language use, and tool making.
Energy
The capacity to do work or produce change, existing in various forms such as kinetic, potential, thermal, electrical, chemical, and nuclear.