Exam 15: Respiratory System

A) temperature.
B) size of the gas molecule.
C) solubility of the gas in blood.
D) partial pressure differences.
E) pH.

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A) capillaries, tissue fluid, cells.
B) cells, tissue fluid, capillaries.
C) cells, capillaries, tissue fluid.
D) tissue fluid, capillaries, cells.
E) all three are equal.

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A) conscious effort and control.
B) stimulation of inspiration. Expiration is automatic.
C) pontine respiratory group as a necessary part.
D) a set pattern of inspiration - expiration that is always the same.
E) the pre-Bötzinger complex of the ventral respiratory group.

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A) 1, 2, 3, 4
B) 2, 1, 3, 4
C) 4, 3, 1, 2
D) 3, 2, 1, 4
E) 4, 3, 2, 1

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A) O2 diffuses from tissue cells into the blood, while CO2 diffuses from the blood into tissue cells.
B) O2 diffuses from the blood into tissue cells, while CO2 diffuses from tissue cells into the blood.
C) both O2 and CO2 diffuse from the blood into tissue cells.
D) both O2 and CO2 diffuse from tissue cells into the blood.
E) O2 diffuses from the blood into tissue cells, but there is no net movement of CO2.

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B

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A) olfaction
B) taste
C) production of chemical mediators
D) voice production
E) regulation of blood pH

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A) the Po2 is higher in the capillaries than in the alveoli.
B) the Po2 is lower in the capillaries than in the alveoli.
C) the Po2 is equal in the capillaries and in the alveoli.
D) the Po2 is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries.
E) the Po2 is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries.

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A) O2 diffuses from the alveoli into the blood, while CO2 diffuses from the blood into the alveoli.
B) O2 diffuses from the blood into the alveoli, while CO2 diffuses from the alveoli into the blood.
C) both O2 and CO2 diffuse from the blood into the alveoli.
D) both O2 and CO2 diffuse from the alveoli into the blood.
E) O2 diffuses from the alveoli into the blood, but there is no net movement of CO2.

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A) decrease, decrease, increase
B) increase, decrease, increase
C) decrease, increase, decrease
D) increase, increase, decrease

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A) increased alveolar volume causes increased alveolar pressure.
B) increased alveolar volume causes decreased alveolar pressure.
C) decreased alveolar volume causes increased alveolar pressure.
D) decreased alveolar volume causes decreased alveolar pressure.
E) decreased alveolar pressure caused increased alveolar volume.

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A) alveoli.
B) primary bronchi.
C) terminal bronchioles.
D) trachea.
E) respiratory bronchi.

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A) 1, 2, 3
B) 2, 1, 3
C) 2, 3, 1
D) 3, 1, 2
E) 3, 2, 1

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D

A) is an active process.
B) requires more muscle contractions than inspiration.
C) is due to contraction of the diaphragm and elevation of the ribs.
D) occurs when the diaphragm and external intercostal muscles relax.
E) is not affected by the elastic properties of the lungs.

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D

A) ciliated simple cuboidal epithelial cells
B) Type I pneumocytes
C) surfactant secreting cells
D) macrophages

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