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Unformatted text preview: in carbon.❜❜
A. M atch these terms with the Carbon dioxide (CO2) Oxygen (O2) correct statement or definition:
1 . Comprises about 21% of the gas in the atmosphere; required for
the final step of extracting energy from food molecules.
2 . Produced when organic molecules such as glucose are
metabolized in the cells of the body; toxic if it is allowed to
accumulate within cells. 5 B . Using the terms provided, complete these statements:
3. Water has many important properties for living organisms.
Water can absorb large amounts of (1) and remain at a
stable temperature. Water also acts as an effective (2) ; for
example, tears protect the surface of the eye. Water is
necessary in many chemical reactions, such as the (3) of
food. Water is necessary for (4) of nutrients, gases, and
waste products in the body. When ionic substances dissolve
in water, the positive and negative ions separate, or (5) ,
allowing the ions to stay in solution and (6) with other
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- Spring '14