Question 1

Oxygen is transported in the blood

Accepted Answer

A) bound to hemoglobin. 
B) bound to albumin. 
C) dissolved in the plasma. 
D) as part of the bicarbonate ion. 
E) dissolved in the plasma and bound to hemoglobin. 
A) bound to hemoglobin. 
B) bound to albumin. 
C) dissolved in the plasma. 
D) as part of the bicarbonate ion. 
E) dissolved in the plasma and bound to hemoglobin.

Question 2

A molecule of air enters the nose through the external nares.Which of the following is the correct pathway to the trachea?

Accepted Answer

A) nasal cavity,larynx,pharynx,trachea 
B) oral cavity,nasal cavity,larynx,pharynx,trachea 
C) nasopharynx,nasal cavity,laryngopharynx,trachea 
D) nasal cavity,pharynx,larynx,trachea 
E) nasal cavity,trachea,larynx,pharynx 
A) nasal cavity,larynx,pharynx,trachea 
B) oral cavity,nasal cavity,larynx,pharynx,trachea 
C) nasopharynx,nasal cavity,laryngopharynx,trachea 
D) nasal cavity,pharynx,larynx,trachea 
E) nasal cavity,trachea,larynx,pharynx

Question 3

Calculate the alveolar ventilation if the tidal volume is 500 ml.,the respiratory rate is 12/minute,and the anatomical dead space is 100 ml.

Accepted Answer

A) 1200 ml 
B) 1800 ml 
C) 4800 ml 
D) 6000 ml 
E) 7200 ml 
A) 1200 ml 
B) 1800 ml 
C) 4800 ml 
D) 6000 ml 
E) 7200 ml

Question 4

Which of the following respiratory membrane layers is closest to air in the alveolus?

Accepted Answer

A) alveolar epithelium 
B) alveolar basement membrane 
C) capillary basement membrane 
D) capillary endothelium 
E) alveolar fluid (with surfactant) 
A) alveolar epithelium 
B) alveolar basement membrane 
C) capillary basement membrane 
D) capillary endothelium 
E) alveolar fluid (with surfactant)

Question 5

Which of the following is NOT a respiratory adaptation to exercise training?

Accepted Answer

A) vital capacity increases 
B) tidal volume at maximal exercise will increase 
C) increased minute ventilation after training 
D) after training,respiratory rate at rest is lower 
A) vital capacity increases 
B) tidal volume at maximal exercise will increase 
C) increased minute ventilation after training 
D) after training,respiratory rate at rest is lower

Question 6

Which of the following is NOT a function of the respiratory system?

Accepted Answer

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

Question 7

In which of the following sequences does PO2 progressively decrease?

Accepted Answer

A) body tissue,arterial blood,alveolar air 
B) body tissue,alveolar air,arterial blood 
C) blood in aorta,atmospheric air,body tissues 
D) atmospheric air,blood in aorta,body tissues 
E) body tissue,aorta,alveolar air 
A) body tissue,arterial blood,alveolar air 
B) body tissue,alveolar air,arterial blood 
C) blood in aorta,atmospheric air,body tissues 
D) atmospheric air,blood in aorta,body tissues 
E) body tissue,aorta,alveolar air

Question 8

What is the function of the nasal conchae?

Accepted Answer

A) increases turbulence in the airflow 
B) olfaction 
C) increases surface area for cleaning,warming,and moisturizing the air 
D) increases turbulence and surface area for cleaning,warming and moisturizing the air 
A) increases turbulence in the airflow 
B) olfaction 
C) increases surface area for cleaning,warming,and moisturizing the air 
D) increases turbulence and surface area for cleaning,warming and moisturizing the air

Question 9

When these ligaments or folds come together,they prevent food from entering the lower respiratory tract.

Accepted Answer

A) vocal folds 
B) vestibular folds 
C) cricothyroid ligaments 
D) epiglottic folds 
E) vocal folds and vestibular folds 
A) vocal folds 
B) vestibular folds 
C) cricothyroid ligaments 
D) epiglottic folds 
E) vocal folds and vestibular folds

Question 10

Oxygenated blood is carried to the tissues of the lungs via the

Accepted Answer

A) pulmonary veins. 
B) bronchial arteries. 
C) pulmonary artery. 
D) abdominal aorta. 
E) pleural arteries. 
A) pulmonary veins. 
B) bronchial arteries. 
C) pulmonary artery. 
D) abdominal aorta. 
E) pleural arteries.

Question 11

During exercise,ventilation initially increases due to

Accepted Answer

A) increased blood carbon dioxide levels stimulating baroreceptors. 
B) decreased blood oxygen levels stimulating chemoreceptors. 
C) decreased blood pH levels stimulating baroreceptors. 
D) limb movements that stimulate the respiratory center. 
E) abrupt changes in metabolism or blood gases. 
A) increased blood carbon dioxide levels stimulating baroreceptors. 
B) decreased blood oxygen levels stimulating chemoreceptors. 
C) decreased blood pH levels stimulating baroreceptors. 
D) limb movements that stimulate the respiratory center. 
E) abrupt changes in metabolism or blood gases.

Question 12

Which of the following is NOT a factor that influences the rate of gas diffusion through the respiratory membrane?

Accepted Answer

A) the partial pressure gradient of the gases 
B) the thickness of the respiratory membrane 
C) the diffusion coefficient of the gases 
D) the temperature of the gases 
E) the surface area of the membrane 
A) the partial pressure gradient of the gases 
B) the thickness of the respiratory membrane 
C) the diffusion coefficient of the gases 
D) the temperature of the gases 
E) the surface area of the membrane

Question 13

Match the term with the appropriate description,answer with the letter preceding the description.
-hard palate "Enter the letter of the correct description below"

Accepted Answer

A) the floor of the nasal cavity 
B) superior portion of pharynx 
C) a soft process that extends inferiorly from the posterior edge of the soft palate 
D) the opening of the nasal cavity into the pharynx 
E) external openings of the nasal cavity 
A) the floor of the nasal cavity 
B) superior portion of pharynx 
C) a soft process that extends inferiorly from the posterior edge of the soft palate 
D) the opening of the nasal cavity into the pharynx 
E) external openings of the nasal cavity

Exam 23: Respiratory System

Oxygen is transported in the blood

A molecule of air enters the nose through the external nares.Which of the following is the correct pathway to the trachea?

Calculate the alveolar ventilation if the tidal volume is 500 ml.,the respiratory rate is 12/minute,and the anatomical dead space is 100 ml.

Which of the following respiratory membrane layers is closest to air in the alveolus?

Which of the following is NOT a respiratory adaptation to exercise training?

Which of the following is NOT a function of the respiratory system?

In which of the following sequences does PO2 progressively decrease?

What is the function of the nasal conchae?

When these ligaments or folds come together,they prevent food from entering the lower respiratory tract.

Oxygenated blood is carried to the tissues of the lungs via the

During exercise,ventilation initially increases due to

Which of the following is NOT a factor that influences the rate of gas diffusion through the respiratory membrane?

Match the term with the appropriate description,answer with the letter preceding the description. -hard palate "Enter the letter of the correct description below"

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In which of the following sequences does PO₂ progressively decrease?