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1
Aquatic animals extract oxygen dissolved in water by trachea or gills while terrestrial animals use direct diffusion or lungs.
A)True
B)False
2
The most efficient respiratory machines that have ever evolved among organisms are the _________________.
A)gills of bony fish
B)lungs of humans
C)skin of amphibians
D)trachea of grasshoppers
3
A fish out of water will suffocate due to lack of oxygen.
A)True
B)False
4
Vertebrates that rely on their skin as well as their lungs for respiration are __________.
A)reptiles
B)fish
C)amphibians
D)mammals
5
Through which of the following would air flow first during exhalation?
A)bronchiole
B)pharynx
C)bronchus
D)trachea
6
A mammal's lungs are located in its abdominal cavity.
A)True
B)False
7
The active pumping of air in and out through the lungs is called ______________.
A)inhalation
B)breathing
C)exhalation
D)cellular respiration
8
Air is drawn into the lungs by the creation of negative pressure.
A)True
B)False
9
Oxygen moves within the circulatory system carried piggyback on ______________.
A)red blood cells
B)white blood cells
C)hemoglobin
D)platelets
10
Hemoglobin molecules carry which of the following gases?
A)O2 (oxygen gas)
B)CO2 (carbon dioxide gas)
C)N 2 (nitrogen gas)
D)both a and b are correct
11
Most of the carbon dioxide moves through the blood by which of the following?
A)By binding to hemoglobin.
B)By dissolving in the cytoplasm of red blood cells.
C)By dissolving in the plasma of the blood.
D)By binding to red blood cells.
12
Cigarette smoke contains powerful mutagens that cause lung cancer.
A)True
B)False
13
The diaphragm contracts during normal exhalation.
A)True
B)False
14
The location where gas exchange occurs in the mammalian lung is the ___________.
A)bronchus
B)trachea
C)diaphragm
D)alveoli
15
Plural membranes stick to the walls of the thoracic cavity due to surfactant.
A)True
B)False
16
Which of the following is a common passageway for both food and air?
A)larynx
B)trachea
C)pharynx
D)bronchus
17
The respiratory efficiency of mammalian lungs is very near maximal.
A)True
B)False
18
The incidence of cancer per 1,000 people is uniform throughout the U.S.
A)True
B)False
19
All animals obtain energy by harvesting energy rich electrons from organic molecules, which requires a steady supply of oxygen.
A)True
B)False
20
Which of the following are used in respiration?
A)skin
B)spiracles
C)gills
D)all of the above





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