BSCS Biology: A Molecular Approach

Chapter 3: Exchanging Materials with the Environment

Exchange in Multicellular Organisms

1.
In cellular respiration, ___ gas is required and ___ gas is given off as a waste product.
A)hydrogen, oxygen
B)carbon dioxide, oxygen
C)oxygen, carbon dioxide
D)nitrogen, oxygen
2.
In countercurrent exchange, the process that makes a fish gill work, the oxygen-rich water flows in a direction ____ the oxygen-poor blood.
A)opposite to
B)parallel with
C)perpendicular to
D)away from
3.
Why have many land animals evolved gas exchange surfaces in interior parts of their bodies?
A)to prevent excess evaporation
B)to give them privacy
C)for protection from smog
D)to reach deep tissues more easily
4.
These illustrations show two ___, gas exchange openings on the surface of leaves.

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A)cuticles
B)stomates
C)alveoli
D)spiracles
5.
Each human kidney contains approximately one million ____, or structures that filter waste materials from the blood.
A)ureters
B)bladders
C)nephrons
D)capillaries
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