Question 1

What forms the respiratory membrane?

Accepted Answer

A)   A single layer of epithelial cells but not its basement membrane
B)   A single layer of epithelial cells and its basement membrane
C)   Two layers of epithelial cells but not their basement membranes
D)   Two layers of epithelial cells and their basement membranesE) A) and C)
F) All of the above

Question 2

The P CO2 of blood in systemic capillaries is __________ than the P CO2 of the blood in pulmonary capillaries.

Accepted Answer

A)   higher
B)   lowerC) A) and B)
D) undefined

Question 3

The receptors for the inflation reflex are most sensitive to what type of stimulus?

Accepted Answer

A)   Touch
B)   Stretch
C)   pH changes
D)   Oxygen levels (P O2)  in alveoliE) A) and B)
F) A) and C) B

Question 4

The chemical reaction between __________ is catalyzed by the enzyme carbonic anhydrase.

Accepted Answer

A)   carbon dioxide and water
B)   carbon dioxide and bicarbonate ion
C)   water and bicarbonate ion
D)   carbon dioxide and hydrogen ionE) C) and D)
F) B) and C)

Question 5

The most common form of lung cancer originates from what cell type?

Accepted Answer

A)   Epithelial cells
B)   Smooth muscle cells
C)   Loose connective tissue cells
D)   Hyaline cartilage cellsE) A) and D)
F) All of the above

Question 6

A breathing pattern that eliminates too much CO 2 is called hyperventilation.

Accepted Answer

A) True 
 B)False

Question 7

During inspiration, why does air move into the lungs?

Accepted Answer

A)   The pressure inside the lungs has decreased below atmospheric pressure.
B)   The pressure inside the lungs has increased above atmospheric pressure.
C)   The increased pressure in the lungs has opened up collapsed airways, so air can flow in.
D)   The space (volume)  within the lungs has decreased, allowing air flow into the lungs.E) C) and D)
F) None of the above A

Question 8

During __________, air movement is due to increased air pressure in the lungs.

Accepted Answer

A)   expiration
B)   inspirationC) A) and B)
D) undefined

Question 9

The respiratory centers are located in the medulla oblongata and the __________ of the brainstem.

Accepted Answer

pons

Question 10

How is oxygen transported in the blood?

Accepted Answer

A)   1-2% dissolved in plasma; 98-99% as oxyhemoglobin
B)   10-20% dissolved in plasma; 80-90% as oxyhemoglobin
C)   50% dissolved in plasma; 50% as oxyhemoglobin
D)   98-99% dissolved in plasma; 1-2% as oxyhemoglobinE) B) and D)
F) C) and D)

Question 11

At the end of a quiet expiration, an additional volume of air can be expelled from the lungs. What is this additional amount of air called?

Accepted Answer

A)   Expiratory reserve volume
B)   Residual volume
C)   Inspiratory reserve volume
D)   Vital capacity
E)   Tidal volumeF) A) and C)
G) A) and B)

Question 12

An increase in blood P CO2 results in a(n)  __________ in pH.

Accepted Answer

A)   increase
B)   decreaseC) A) and B)
D) undefined

Question 13

Without surfactant, the surface tension within the alveoli of the lungs would cause __________.

Accepted Answer

A)   collapse of alveoli
B)   a drop in pressure within alveoli
C)   over-inflation of alveoli
D)   leakiness of the respiratory membraneE) C) and D)
F) None of the above

Question 14

What structures form a respiratory membrane?

Accepted Answer

A)   An alveolar wall, a bronchiolar wall, and their basement membranes
B)   The vocal folds and the glottis between them
C)   A capillary wall, an alveolar wall, and their basement membranes
D)   The parietal pleura, the visceral pleura, and the serous fluid between themE) A) and B)
F) C) and D)

Question 15

What results from the breathing pattern called hyperventilation?

Accepted Answer

A)   Decrease in plasma P CO2
B)   Increase in plasma P CO2
C)   Decrease in plasma P O2
D)   Decrease in blood pHE) C) and D)
F) All of the above

Question 16

How is carbaminohemoglobin formed?

Accepted Answer

A)   Carbon dioxide binds to hemoglobin.
B)   Carbon atoms bind to hemoglobin.
C)   Carbonic anhydrase binds to hemoglobin.
D)   Carbohydrates bind to hemoglobin.E) B) and C)
F) A) and D)

Question 17

Why is laryngitis a potentially dangerous condition?

Accepted Answer

A)   It can lead to obstruction of the esophagus.
B)   It can cause obstruction of the airway.
C)   It could spread, causing an inner ear infection.
D)   It could cause difficulty swallowing.E) All of the above
F) A) and B)

Question 18

What type of tissue forms the lining of the nasal cavities?

Accepted Answer

A)   Pseudostratified ciliated columnar epithelium
B)   Simple squamous epithelium
C)   Stratified squamous epithelium
D)   Loose connective tissueE) A) and B)
F) B) and D)

Question 19

What is the pathway for airflow from the nasal cavity to the location of gas exchange within the lungs?

Accepted Answer

A)   Nasal cavity → pharynx → larynx → bronchial tree → alveoli
B)   Nasal cavity → larynx → pharynx → bronchial tree → alveoli
C)   Nasal cavity → bronchial tree → pharynx → larynx → alveoli
D)   Nasal cavity → larynx → bronchial tree→ pharynx → alveoliE) A) and C)
F) A) and B)

Question 20

The __________ respiratory group is responsible for the basic rhythm of breathing, stimulating the inspiratory muscles.

Accepted Answer

A)   ventral
B)   dorsal
C)   pontineD) A) and C)
E) A) and B)

Exam 16: Respiratory System

What forms the respiratory membrane?

Correct AnswerverifiedShow Answer

The P CO2 of blood in systemic capillaries is __________ than the P CO2 of the blood in pulmonary capillaries.

Correct AnswerverifiedShow Answer

The receptors for the inflation reflex are most sensitive to what type of stimulus?

Correct AnswerverifiedB

The chemical reaction between __________ is catalyzed by the enzyme carbonic anhydrase.

Correct AnswerverifiedShow Answer

The most common form of lung cancer originates from what cell type?

Correct AnswerverifiedShow Answer

A breathing pattern that eliminates too much CO 2 is called hyperventilation.

Correct AnswerverifiedShow Answer

During inspiration, why does air move into the lungs?

Correct AnswerverifiedA

During __________, air movement is due to increased air pressure in the lungs.

Correct AnswerverifiedShow Answer

The respiratory centers are located in the medulla oblongata and the __________ of the brainstem.

Correct Answerverifiedpons

How is oxygen transported in the blood?

Correct AnswerverifiedShow Answer

At the end of a quiet expiration, an additional volume of air can be expelled from the lungs. What is this additional amount of air called?

Correct AnswerverifiedShow Answer

An increase in blood P CO2 results in a(n) __________ in pH.

Correct AnswerverifiedShow Answer

Without surfactant, the surface tension within the alveoli of the lungs would cause __________.

Correct AnswerverifiedShow Answer

What structures form a respiratory membrane?

Correct AnswerverifiedShow Answer

What results from the breathing pattern called hyperventilation?

Correct AnswerverifiedShow Answer

How is carbaminohemoglobin formed?

Correct AnswerverifiedShow Answer

Why is laryngitis a potentially dangerous condition?

Correct AnswerverifiedShow Answer

What type of tissue forms the lining of the nasal cavities?

Correct AnswerverifiedShow Answer

What is the pathway for airflow from the nasal cavity to the location of gas exchange within the lungs?

Correct AnswerverifiedShow Answer

The __________ respiratory group is responsible for the basic rhythm of breathing, stimulating the inspiratory muscles.

Correct AnswerverifiedShow Answer

Correct Answer
verified

The P _CO2 of blood in systemic capillaries is __________ than the P _CO2 of the blood in pulmonary capillaries.

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

A breathing pattern that eliminates too much CO ₂ is called hyperventilation.

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified
pons

Correct Answer
verified

Correct Answer
verified

An increase in blood P _CO2 results in a(n) __________ in pH.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified