Question 1

Which chemical has the least influence on the regulation of breathing rate?

Accepted Answer

A)   chemical O2
B)   chemical N2
C)   chemical H
D)   chemical CO2E) None of the above
F) B) and D)

Question 2

Which animals use positive pressure breathing to ventilate their lungs?

Accepted Answer

A)   reptiles
B)   birds
C)   dogs
D)   frogsE) B) and D)
F) A) and D)

Question 3

Which term refers to the initial branches of the trachea that lead into each lung?

Accepted Answer

A)   bronchioles
B)   alveoli
C)   pleura
D)   bronchiE) B) and C)
F) A) and C)

Question 4

If N2 gas comprises 79% of atmospheric air at sea level, what is the partial pressure of N2?

Accepted Answer

A)   about 300 mm Hg
B)   about 500 mm Hg
C)   about 600 mm Hg
D)   about 700 mm HgE) All of the above
F) C) and D)

Question 5

Which of the following is involved in both cellular respiration and physiological respiration in humans?

Accepted Answer

A)   the respiratory surface
B)   the circulatory system
C)   mitochondria
D)   the respiratory mediumE) None of the above
F) C) and D)

Question 6

Which of the following occurs during human inhalation?

Accepted Answer

A)   The diaphragm relaxes and the external intercostal muscles relax.
B)   The diaphragm relaxes and the external intercostal muscles contract.
C)   The diaphragm contracts and the external intercostal muscles relax.
D)   The diaphragm contracts and the external intercostal muscles contract.E) B) and C)
F) C) and D)

Question 7

Which of the following respiratory surfaces lack physical protection from the external environment?

Accepted Answer

A)   internal gills
B)   lungs
C)   tracheal system tubes
D)   external gillsE) None of the above
F) B) and C)

Question 8

Alveoli are surrounded by pulmonary capillaries.

Accepted Answer

A) True 
 B)False

Question 9

Why is proper ventilation important for a respiring animal?

Accepted Answer

A)   It directly increases gas exchange between the blood and cells.
B)   It maintains blood circulation within the body of an animal.
C)   It maintains proper O2 and CO2 levels on the internal side of the respiratory surface so that diffusion across it can be maintained.
D)   It maintains proper O2 and CO2 levels on the external side of the respiratory surface so that diffusion across it can be maintained.E) All of the above
F) A) and C)

Question 10

Match each term with its description.
-breathing

Accepted Answer

A)  flow of blood (or body fluids)  on the internal side of the respiratory surface
B)  gas exchange between the blood and body tissue cells
C)  general term used to describe an animal's exchange of gases with the respiratory medium
D)  specifically describes the release of air from the lungs to the atmosphere
E)  flow of the respiratory medium over the external side of the respiratory surfaceF) occurs due to the expansion of the lungs and thoracic cavityG) exchange of gases between the respiratory medium and the blood (or internal body fluids) H) A) and D)
I) B) and E)

Question 11

Which of the following encourages the movement of water over gills?

Accepted Answer

A)   beating cilia
B)   a fish swimming with its mouth closed
C)   the diaphragm contracting
D)   a muscular tail contractingE) None of the above
F) C) and D)

Question 12

A larynx is found at the beginning of each insect trachea.

Accepted Answer

A) True 
 B)False

Question 13

Match each term with its description.
-ventilation

Accepted Answer

A)  flow of blood (or body fluids)  on the internal side of the respiratory surface
B)  gas exchange between the blood and body tissue cells
C)  general term used to describe an animal's exchange of gases with the respiratory medium
D)  specifically describes the release of air from the lungs to the atmosphere
E)  flow of the respiratory medium over the external side of the respiratory surfaceF) occurs due to the expansion of the lungs and thoracic cavityG) exchange of gases between the respiratory medium and the blood (or internal body fluids) H) D) and F)
I) A) and G)

Question 14

Which of the following is an example of local control over breathing?

Accepted Answer

A)   the interneuron groups of the pons refining the contractions involved with inhalation and exhalation
B)   the aortic bodies signalling an increase in breathing rate when blood pH is acidic
C)   the carotid bodies signalling an increase in breathing rate when O2 levels are low
D)   automated lung ventilation and lung perfusion adjustments maximizing O2 and CO2 exchangeE) A) and B)
F) A) and C)

Question 15

Which event occurs in body tissue blood?

Accepted Answer

A)   In the plasma, HCO3- and H+ convert into CO2 and H2O.
B)   Erythrocyte HCO3- enters the plasma.
C)   Free H+ releases from hemoglobin.
D)   CO2 binds to hemoglobin.E) A) and B)
F) A) and C)

Question 16

Which animals use air sacs to ventilate their lungs?

Accepted Answer

A)   reptiles
B)   horses
C)   birds
D)   frogsE) B) and C)
F) A) and C)

Question 17

Which of the following is an example of a respiratory surface?

Accepted Answer

A)   fish fins
B)   human nose
C)   reptilian skin
D)   human lungsE) None of the above
F) All of the above

Question 18

What would you predict would happen in an area of the body where blood is relatively acidic (low pH) ?

Accepted Answer

A)   CO2 would bind more readily to hemoglobin.
B)   O2 would release from hemoglobin.
C)   CO2 would release from hemoglobin.
D)   O2 would bind more readily to hemoglobin.E) A) and B)
F) All of the above

Question 19

Which of the following animals have the highest O2 consumption per gram ever recorded for animals?

Accepted Answer

A)   aquatic animals
B)   insects at rest
C)   insects at flight
D)   birds at flightE) A) and B)
F) A) and C)

Question 20

What happens to the chest cavity and air pressure in the lungs during exhalation?

Accepted Answer

A)   The chest cavity increases, and air pressure decreases.
B)   The chest cavity increases, and air pressure also increases.
C)   The chest cavity decreases, and air pressure increases.
D)   The chest cavity decreases, and air pressure also decreases.E) B) and C)
F) A) and D)

Exam 40: Gas Exchange: the Respiratory System

Which event occurs in body tissue blood?

Correct AnswerverifiedShow Answer

If N2 gas comprises 79% of atmospheric air at sea level, what is the partial pressure of N2?

Correct AnswerverifiedShow Answer

A larynx is found at the beginning of each insect trachea.

Correct AnswerverifiedShow Answer

Alveoli are surrounded by pulmonary capillaries.

Correct AnswerverifiedShow Answer

Which of the following is involved in both cellular respiration and physiological respiration in humans?

Correct AnswerverifiedShow Answer

Which of the following encourages the movement of water over gills?

Correct AnswerverifiedShow Answer

Which term refers to the initial branches of the trachea that lead into each lung?

Correct AnswerverifiedShow Answer

Which animals use positive pressure breathing to ventilate their lungs?

Correct AnswerverifiedShow Answer

Match each term with its description. -ventilation

Correct AnswerverifiedShow Answer

Which chemical has the least influence on the regulation of breathing rate?

Correct AnswerverifiedShow Answer

What would you predict would happen in an area of the body where blood is relatively acidic (low pH) ?

Correct AnswerverifiedShow Answer

Which of the following animals have the highest O2 consumption per gram ever recorded for animals?

Correct AnswerverifiedShow Answer

What happens to the chest cavity and air pressure in the lungs during exhalation?

Correct AnswerverifiedShow Answer

Which of the following is an example of local control over breathing?

Correct AnswerverifiedShow Answer

Match each term with its description. -breathing

Correct AnswerverifiedShow Answer

Which animals use air sacs to ventilate their lungs?

Correct AnswerverifiedShow Answer

Which of the following is an example of a respiratory surface?

Correct AnswerverifiedShow Answer

Which of the following occurs during human inhalation?

Correct AnswerverifiedShow Answer

Which of the following respiratory surfaces lack physical protection from the external environment?

Correct AnswerverifiedShow Answer

Why is proper ventilation important for a respiring animal?

Correct AnswerverifiedShow Answer

Correct Answer
verified

If N₂ gas comprises 79% of atmospheric air at sea level, what is the partial pressure of N₂?

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

Correct Answer
verified

Which of the following animals have the highest O₂ consumption per gram ever recorded for animals?

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