Question 1

Which of the choices below determines the direction of respiratory gas movement?

Accepted Answer

A)   solubility in water
B)   partial pressure gradient
C)   molecular weight and size of the gas molecule
D)   the temperature

Question 2

With the Bohr effect, more oxygen is released because a(n)  .

Accepted Answer

A)   increase in pH (alkalosis)  strengthens the hemoglobin- oxygen bond
B)   decrease in pH (acidosis)  strengthens the hemoglobin- oxygen bond
C)   increase in pH (alkalosis)  weakens the hemoglobin- oxygen bond
D)   decrease in pH (acidosis)  weakens the hemoglobin- oxygen bond

Question 3

Figure 22.2Using Figure 22.2, match the following:
-Tidal volume.

Accepted Answer

The answer of  Figure 22.2Using Figure 22.2, match the...

Question 4

Figure 22.1Using Figure 22.1, match the following:
-Pharynx.

Accepted Answer

The answer of  Figure 22.1Using Figure 22.1, match the...

Question 5

Intrapulmonary pressure is the .

Accepted Answer

A)   pressure within the alveoli of the lungs
B)   pressure within the pleural cavity
C)   negative pressure in the intrapleural space
D)   difference between atmospheric pressure and respiratory pressure

Question 6

For gas exchange to be efficient, the respiratory membrane must be .

Accepted Answer

A)   0.5 to 1 micrometer thick
B)   between 5 and 6 micrometers thick
C)   The thickness of the respiratory membrane is not important in the efficiency of gas exchange.
D)   at least 3 micrometers thick

Question 7

As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin (the Haldane effect), which in turn allows more CO2 to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect).

Accepted Answer

A) True 
 B)False

Question 8

Nasal conchae mainly work on inhalation to warm and moisten air. They serve minor functions for exhalation.

Accepted Answer

A) True 
 B)False

Question 9

Possible causes of hypoxia include _.

Accepted Answer

A)   getting very cold
B)   obstruction of the esophagus
C)   too little oxygen in the atmosphere
D)   taking several rapid deep breaths

Question 10

The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the .

Accepted Answer

A)   temperature is lower at higher altitudes
B)   concentration of oxygen and/or total atmospheric pressure is lower at high altitudes
C)   concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes
D)   basal metabolic rate is higher at high altitudes

Question 11

The cartilaginous flap that closes the trachea during swallowing is called the _.

Accepted Answer

The answer of The cartilaginous flap that closes the trachea...

Question 12

The average individual has 500 ml of residual volume in his lungs.

Accepted Answer

A) True 
 B)False

Question 13

The amount of air that can be inspired above the tidal volume is called _.

Accepted Answer

A)   reserve air
B)   inspiratory reserve
C)   expiratory capacity
D)   vital capacity

Question 14

Figure 22.1Using Figure 22.1, match the following:
-The archway in the back of the throat is called the .

Accepted Answer

The answer of  Figure 22.1Using Figure 22.1, match the...

Question 15

The partial pressure gradient for oxygen (in the body) is much steeper than that for carbon dioxide. Explain how equal amounts of these two gases can be exchanged (in a given time interval) in the lungs and at the tissues.

Accepted Answer

Equal amounts of O₂ and CO₂ can ...

Question 16

If a baby is born at 28 weeks' gestation, what major problem will the doctors look for?

Accepted Answer

The type II alveolar cells may...

Question 17

The main site of gas exchange is the .

Accepted Answer

A)   respiratory bronchiole
B)   alveolar duct
C)   alveolar sacs
D)   alveoli

Question 18

Figure 22.2Using Figure 22.2, match the following:
-Inspiratory reserve volume.

Accepted Answer

The answer of  Figure 22.2Using Figure 22.2, match the...

Question 19

Factors that influence the rate and depth of breathing include .

Accepted Answer

A)   thalamic control
B)   stretch receptors in the alveoli
C)   voluntary cortical control
D)   temperature of alveolar air

Question 20

Changes in arterial pH can modify respiration rate and rhythm even when carbon dioxide and oxygen levels are normal.

Accepted Answer

A) True 
 B)False

Exam 22: The Respiratory System

As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin (the Haldane effect), which in turn allows more CO2 to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect).

Correct AnswerverifiedShow Answer

The amount of air that can be inspired above the tidal volume is called _.

Correct AnswerverifiedShow Answer

The main site of gas exchange is the .

Correct AnswerverifiedShow Answer

The partial pressure gradient for oxygen (in the body) is much steeper than that for carbon dioxide. Explain how equal amounts of these two gases can be exchanged (in a given time interval) in the lungs and at the tissues.

Correct AnswerverifiedEqual amounts of O2 and CO2 can ...View AnswerShow Answer

The average individual has 500 ml of residual volume in his lungs.

Correct AnswerverifiedShow Answer

Figure 22.1Using Figure 22.1, match the following: -Pharynx.

Correct AnswerverifiedShow Answer

The cartilaginous flap that closes the trachea during swallowing is called the _.

Correct AnswerverifiedShow Answer

Nasal conchae mainly work on inhalation to warm and moisten air. They serve minor functions for exhalation.

Correct AnswerverifiedShow Answer

Figure 22.2Using Figure 22.2, match the following: -Inspiratory reserve volume.

Correct AnswerverifiedShow Answer

If a baby is born at 28 weeks' gestation, what major problem will the doctors look for?

Correct AnswerverifiedThe type II alveolar cells may...View AnswerShow Answer

With the Bohr effect, more oxygen is released because a(n) .

Correct AnswerverifiedShow Answer

Factors that influence the rate and depth of breathing include .

Correct AnswerverifiedShow Answer

The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the .

Correct AnswerverifiedShow Answer

Which of the choices below determines the direction of respiratory gas movement?

Correct AnswerverifiedShow Answer

Intrapulmonary pressure is the .

Correct AnswerverifiedShow Answer

Figure 22.2Using Figure 22.2, match the following: -Tidal volume.

Correct AnswerverifiedShow Answer

Changes in arterial pH can modify respiration rate and rhythm even when carbon dioxide and oxygen levels are normal.

Correct AnswerverifiedShow Answer

Possible causes of hypoxia include _.

Correct AnswerverifiedShow Answer

Figure 22.1Using Figure 22.1, match the following: -The archway in the back of the throat is called the .

Correct AnswerverifiedShow Answer

For gas exchange to be efficient, the respiratory membrane must be .

Correct AnswerverifiedShow Answer

As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin (the Haldane effect), which in turn allows more CO₂ to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect).

Correct Answer
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Equal amounts of O₂ and CO₂ can ...
View Answer

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The type II alveolar cells may...
View Answer

Correct Answer
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