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ANSC 415 EXAM3 QUESTIONS AND CORRECT ANSWERS LATEST UPDATE ALREADY GRADED A+
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ANSC 415 EXAM3 QUESTIONS AND CORRECT ANSWERS LATEST UPDATE ALREADY GRADED A+
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ANSC 415 EXAM3 QUESTIONS AND CORRECT ANSWERS 2024-2025 LATESTUPDATE ALREADY GRADED A+
Which respiratory structures serve to warm and humidify inhaled air and also to cool blood going to the
brain?
a. Larynx
b. Nares
c. Conchae
d. Syrinx - answer-c
Diffusion of gases between air and blood occurs mostly in the:
a. respiratory bronchioles.
b. alveoli.
c. conchae.
d. heart. - answer-b
The aorta, venae cavae, esophagus, and large lymph vessels occupy a space within the thorax known as
the:
a. intrapleural space
b. mediastinal space
c. intrapulmonic space
d. outer space - answer-b
A condition of pleuritis would accentuate:
a. abdominal breathing.
b. costal breathing. - answer-a
A difficult, labored state of breathing is termed:
a. eupnea.
b. dyspnea.
,c. hyperpnea.
d. polypnea. - answer-b
The amount of air breathed in or out during a respiratory cycle is known as the: a.
vital capacity.
b. residual volume.
c. tidal volume.
d. functional residual capacity. - answer-c
The PO2 of dry atmospheric air approximates:
a. 40 mm Hg.
b. 100 mm Hg.
c. 160 mm Hg.
d. 760 mm Hg. - answer-c
The PCO2 of dry atmospheric air approximates:
a. 0.23 mm Hg.
b. 23 mm Hg.
c. 40 mm Hg.
d. 45 mm Hg. - answer-a
The total pressure of a gas mixture is 400 mm Hg. Twenty-five percent of the mixture is oxygen. What is
the PO2 of oxygen?
a. 25 mm Hg
b. 400 mm Hg
c. 100 mm Hg
d. 250 mm Hg - answer-c
As compared with atmospheric air, alveolar air has:
,a. higher PO2, lower PCO2, higher PN2.
b. lower PO2, higher PCO2, lower PN2. - answer-b
During inspiration:
a. intrapleural and intrapulmonic pressures are decreased.
b. intrapleural and intrapulmonic pressures are increased.
c. intrapleural pressure is decreased and intrapulmonic pressure is increased.
d. intrapleural pressure is increased and intrapulmonic pressure is decreased. - answer-a
During inspiration the pressure within the mediastinal space:
a. increases.
b. decreases.
c. remains the same. - answer-b
During expiration the intrapulmonic pressure:
a. increases.
b. decreases.
c. goes bonkers. - answer-a
Return of blood to the right atrium is assisted when:
a. the thorax is expanded (intrapleural pressure decreased from normal) during
inspiration.
b. the thorax is contracted (intrapleural pressure returned to normal) during
expiration. - answer-a
A pulmonary physiologic dead space is:
a. the total volume of airways (anatomic volume).
b. the total volume of airways and alveoli.
c. one composed only of nonperfused alveoli.
, d. that part of the tidal volume that is inspired but takes no part in gas exchange. - answer-d
When the lungs are expanded during inspiration:
a. the pressure inside the venae cavae is increased.
b. the pressure inside the venae cavae is decreased.
c. there is no change in the pressure inside the venae cavae. - answer-b
Which one of the ventilation subdivisions is normally increased during panting? a.
Alveolar ventilation
b. Dead space ventilation - answer-b
Alveolar PCO2 is measured to be 45 mm Hg. Considering this value, one would expect atmospheric PCO2
to be ______ than 45 mm Hg and venous blood PCO2 to be ______ than 45 mm Hg. (Select the
respective words from the sets below that complete the above blanks.) a. Greater, less
b. Less, less
c. Less, greater
d. Greater, greater - answer-c
The PO2 of blood in the pulmonary arteries is higher than the PO2 of blood in the pulmonary veins. a.
True
b. False - answer-b
The PCO2 in the interstitial fluid compartment is higher than the PCO2 of blood in the capillaries. a.
True
b. False - answer-a
Most of the oxygen transported in the blood is that which is: a. in solution.
b. associated with plasma proteins.
c. associated with carbon dioxide.
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