BIO 182 Exam 2 2025 Questions and
Answers 100% Pass
The respiratory system of which of the following organisms relies on air sacs to
move air through the lungs?
birds
mammals
fish
amphibians
reptiles - ANSWER-birds
Which of the following statements is true regarding respiration in mammals?
Select all that apply.
A. Air moves in a unidirectional fashion through the lungs.
B. Gas exchange occurs in the bronchioles.
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,C. Gas exchange occurs in the alveoli.
D. Respiration depends on changes in air pressure in the chest cavity.
E. Respiration depends on contractions of the diaphragm. - ANSWER-C,D,E
Simple multicellular organisms that are small can meet their gas exchange needs by
means of: Select all that apply.
A. a flattened body shape that increases surface area
B. a flattened or thin body shape that reduces the distance between cells inside
their body and the external environment
C. by living in air that provides abundant oxygen, even though they are at risk of
losing water and drying out
D. by living in water so that they do not dry out from water loss, even though
water has less oxygen per volume than air
E. by relying on anaerobic respiration (glycolysis) for long time periods, so that
they don't need to use oxygen for aerobic respiration - ANSWER-A,B,D
Imagine that a young girl suffers a horseback-riding injury, and one of her ribs
punctures her diaphragm. How will this injury affect the girl's breathing?
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, A. The injury will make it easier to increase negative air pressure in her chest cavity,
making inhalation easier.
B. The injury will make it more difficult to increase negative air pressure in her
chest cavity, making inhalation more difficult.
C. The injury will make it more difficult to decrease negative air pressure in her
chest cavity, making inhalation more difficult.
D. The injury will not affect her at all, as intercostal muscles are responsible for
breathing. - ANSWER-B
Which of the following present challenges that make gas exchange more difficult
for fish than for terrestrial animals? Select all that apply.
A. Water is denser and more viscous than air.
B. Water contains much less O2 than air per unit volume.
C. Gills have less surface area than lungs.
D. Unidirectional flow of water is less efficient than tidal ventilation.
E. Diffusion occurs more slowly in water than in air. - ANSWER-A,B,E
In a mammal's bloodstream, where would you expect to find oxygen? Select all
that apply.
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Answers 100% Pass
The respiratory system of which of the following organisms relies on air sacs to
move air through the lungs?
birds
mammals
fish
amphibians
reptiles - ANSWER-birds
Which of the following statements is true regarding respiration in mammals?
Select all that apply.
A. Air moves in a unidirectional fashion through the lungs.
B. Gas exchange occurs in the bronchioles.
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,C. Gas exchange occurs in the alveoli.
D. Respiration depends on changes in air pressure in the chest cavity.
E. Respiration depends on contractions of the diaphragm. - ANSWER-C,D,E
Simple multicellular organisms that are small can meet their gas exchange needs by
means of: Select all that apply.
A. a flattened body shape that increases surface area
B. a flattened or thin body shape that reduces the distance between cells inside
their body and the external environment
C. by living in air that provides abundant oxygen, even though they are at risk of
losing water and drying out
D. by living in water so that they do not dry out from water loss, even though
water has less oxygen per volume than air
E. by relying on anaerobic respiration (glycolysis) for long time periods, so that
they don't need to use oxygen for aerobic respiration - ANSWER-A,B,D
Imagine that a young girl suffers a horseback-riding injury, and one of her ribs
punctures her diaphragm. How will this injury affect the girl's breathing?
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, A. The injury will make it easier to increase negative air pressure in her chest cavity,
making inhalation easier.
B. The injury will make it more difficult to increase negative air pressure in her
chest cavity, making inhalation more difficult.
C. The injury will make it more difficult to decrease negative air pressure in her
chest cavity, making inhalation more difficult.
D. The injury will not affect her at all, as intercostal muscles are responsible for
breathing. - ANSWER-B
Which of the following present challenges that make gas exchange more difficult
for fish than for terrestrial animals? Select all that apply.
A. Water is denser and more viscous than air.
B. Water contains much less O2 than air per unit volume.
C. Gills have less surface area than lungs.
D. Unidirectional flow of water is less efficient than tidal ventilation.
E. Diffusion occurs more slowly in water than in air. - ANSWER-A,B,E
In a mammal's bloodstream, where would you expect to find oxygen? Select all
that apply.
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