Question 1

Quiet expiration is caused by

Accepted Answer

A)  contraction of the external intercostals.
B)  contraction of the internal intercostals.
C)  lung recoil and increased intrapulmonary pressure.
D)  contraction of the scalenes.

Question 2

Acclimatization to altitude results in increased oxygen loading.

Accepted Answer

A) True 
 B)False

Question 3

Where does the reverse chloride shift occur?

Accepted Answer

A)  tissue capillaries
B)  pulmonary capillaries
C)  arterioles
D)  venules

Question 4

The ventilation/perfusion ratio is ________ at the apex of the lungs.

Accepted Answer

A)  highest
B)  lowest
C)  the same as the base A

Question 5

__________ is characterized by high red blood cell counts.

Accepted Answer

A)  Anemia
B)  Polycythemia
C)  Uremia
D)  Leukemia

Question 6

The chloride shift and its reverse play an important role in the acid-base balance of the blood.

Accepted Answer

A) True 
 B)False

Question 7

The maximum amount of gas that can be inspired after a normal tidal expiration is the inspiratory capacity.

Accepted Answer

A) True 
 B)False  True

Question 8

The majority of carbon dioxide is transported in the blood as

Accepted Answer

A)  dissolved carbon dioxide in the blood.
B)  bicarbonate ion.
C)  carbaminohemoglobin.
D)  carboxyhemoglobin.

Question 9

Metabolic alkalosis

Accepted Answer

A)  may be caused by excessive vomiting.
B)  occurs when the partial pressure of oxygen is decreased.
C)  occurs when arterial pH is less than 7.4.
D)  is induced by hypoventilation.

Question 10

The primary drive to breath is elicited by which of the following:

Accepted Answer

A)  reduced PO2.
B)  reduced PCO2.
C)  increased PO2.
D)  increased PCO2.

Question 11

The rhythmicity center is located in the

Accepted Answer

A)  pons.
B)  cerebral cortex.
C)  medulla oblongata.
D)  midbrain.

Question 12

How does surfactant reduce the surface tension of water in the lungs?

Accepted Answer

A)  decomposes water
B)  reduces hydrogen bonding between water molecules
C)  covers the alveoli
D)  All of the choices are correct.

Question 13

An increase in ventilation due to a higher elevation is called

Accepted Answer

A)  hypoxic ventilatory response.
B)  acute mountain sickness.
C)  thalassemia.
D)  Bohr effect.

Question 14

Inhibiting carbonic anhydrase in erythrocytes would cause a decrease in the pH of arterial blood.

Accepted Answer

A) True 
 B)False

Question 15

The partial pressure of oxygen decreases at high altitude because the amount of oxygen in the air is decreased.

Accepted Answer

A) True 
 B)False  False

Question 16

Nitric oxide (NO) may form the following compound and increase the drive to breath.

Accepted Answer

A)  NO2
B)  HCO3
C)  SNOs
D)  SIDS

Question 17

At rest,normal oxygen unloading is ____.

Accepted Answer

A)  97%
B)  75%
C)  39%
D)  22%

Question 18

Quiet expiration will increase intrapulmonary pressure to about +3 mm Hg above atmospheric pressure.

Accepted Answer

A) True 
 B)False

Question 19

Sympathetic agonists could be utilized to treat asthma.

Accepted Answer

A) True 
 B)False

Question 20

Intrapulmonary pressure increases as the diaphragm contracts.

Accepted Answer

A) True 
 B)False

Exam 16: Respiratory Physiology

Quiet expiration is caused by

Correct AnswerverifiedShow Answer

Acclimatization to altitude results in increased oxygen loading.

Correct AnswerverifiedShow Answer

Where does the reverse chloride shift occur?

Correct AnswerverifiedShow Answer

The ventilation/perfusion ratio is ________ at the apex of the lungs.

Correct AnswerverifiedA

__________ is characterized by high red blood cell counts.

Correct AnswerverifiedShow Answer

The chloride shift and its reverse play an important role in the acid-base balance of the blood.

Correct AnswerverifiedShow Answer

The maximum amount of gas that can be inspired after a normal tidal expiration is the inspiratory capacity.

Correct AnswerverifiedTrue

The majority of carbon dioxide is transported in the blood as

Correct AnswerverifiedShow Answer

Metabolic alkalosis

Correct AnswerverifiedShow Answer

The primary drive to breath is elicited by which of the following:

Correct AnswerverifiedShow Answer

The rhythmicity center is located in the

Correct AnswerverifiedShow Answer

How does surfactant reduce the surface tension of water in the lungs?

Correct AnswerverifiedShow Answer

An increase in ventilation due to a higher elevation is called

Correct AnswerverifiedShow Answer

Inhibiting carbonic anhydrase in erythrocytes would cause a decrease in the pH of arterial blood.

Correct AnswerverifiedShow Answer

The partial pressure of oxygen decreases at high altitude because the amount of oxygen in the air is decreased.

Correct AnswerverifiedFalse

Nitric oxide (NO) may form the following compound and increase the drive to breath.

Correct AnswerverifiedShow Answer

At rest,normal oxygen unloading is ____.

Correct AnswerverifiedShow Answer

Quiet expiration will increase intrapulmonary pressure to about +3 mm Hg above atmospheric pressure.

Correct AnswerverifiedShow Answer

Sympathetic agonists could be utilized to treat asthma.

Correct AnswerverifiedShow Answer

Intrapulmonary pressure increases as the diaphragm contracts.

Correct AnswerverifiedShow Answer

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