Question 1

Which of these organisms is able to use several body surfaces, such as gills, skin, and lungs, for respiration?

Accepted Answer

A)   humans
B)   birds
C)   amphibians
D)   reptiles
E)   None of these are correct.F) None of the above
G) B) and E)

Question 2

Which features are required for efficient external respiration to take place?

Accepted Answer

A)   The gas exchange region must be moist, thin and have a large surface area.
B)   The gas exchange region must be dry, thin and have a large surface area.
C)   The gases being exchanged must be present in a low concentration in order for diffusion to occur.
D)   Gas exchange can only occur at a temperature lower than the body temperature of the organism.
E)   The gas exchange needs to occur in an aquatic environment in order to be efficient.F) A) and D)
G) A) and C)

Question 3

The iron in a hemoglobin molecule is actually what binds the oxygen.

Accepted Answer

A) True 
 B)False

Question 4

Explain what happens when carbonic acid associates with carbonic anhydrase and how this can impact the blood pH.

Accepted Answer

When carbonic acid associates with carbo...

Question 5

Common colds are upper respiratory tract infections. Why are vaccinations against the common cold not practical?

Accepted Answer

A)   There are so many different strains of viruses that cause colds it would be impossible to develop a vaccine against all of them.
B)   Vaccines are very costly to develop.
C)   Vaccines would not work against the common cold because it is caused by a bacterial infection.
D)   Colds are caused by viruses that cannot be prevented by vaccinations.
E)   Vaccinations do not work in the upper respiratory tract.F) A) and B)
G) A) and C)

Question 6

Carbonic anhydrase

Accepted Answer

A)   is a digestive enzyme.
B)   is dissolved in plasma.
C)   speeds up the conversion of carbonic acid to carbon dioxide and water.
D)   speeds up the conversion of carbon dioxide to oxygen.
E)   speeds up the conversion of oxyhemoglobin.F) A) and B)
G) All of the above

Question 7

Which of the following increases the surface area available for gas exchange among various organisms?

Accepted Answer

A)   finely divided inner lung surface in mammals
B)   tubular body shape, as in annelids
C)   finely divided gills in fish
D)   flattened body, as in planarians
E)   All of these choices increase surface area.F) A) and B)
G) A) and E)

Question 8

A disease in which the alveoli are distended and their walls damaged so that surface areas for gas exchange is reduced is

Accepted Answer

A)   bronchitis.
B)   emphysema.
C)   pulmonary tuberculosis.
D)   pneumonia.E) None of the above
F) C) and D)

Question 9

Opercula are

Accepted Answer

A)   gills on a lobster.
B)   gill covers on a fish.
C)   extensions of the body wall in polychaete worms.
D)   internal spaces in a planarian used in digestion and respiration.
E)   tentacles on a hydra.F) A) and B)
G) All of the above

Question 10

Which of the following respiratory disorders might be cured in the future through the use of gene therapy?

Accepted Answer

A)   Cystic fibrosis
B)   Emphysema
C)   Lung cancer
D)   Asthma
E)   Pulmonary fibrosisF) B) and D)
G) D) and E)

Question 11

Trace the path of an inhaled air molecule in a human being.

Accepted Answer

A)   nasal cavity-glottis-larynx-trachea-pharynx-bronchi-bronchioles-alveoli
B)   nasal cavity-pharynx-larynx-glottis-trachea-bronchi-bronchioles-alveoli
C)   nasal cavity-pharynx-glottis-larynx-trachea-bronchi-bronchioles-alveoli
D)   nasal cavity-pharynx-glottis-larynx-trachea-bronchioles-bronchi-alveoli
E)   nasal cavity-pharynx-glottis-trachea-larynx-bronchi-bronchioles-alveoliF) A) and C)
G) C) and D)

Question 12

Which statement is correct about how carbon dioxide is carried in the bloodstream?

Accepted Answer

A)   Carbon dioxide enters the bloodstream from the tissues. It then combines with hemoglobin to form carbaminohemoglobin but most of it is carried in the form of bicarbonate.
B)   Carbon dioxide enters the bloodstream from the atmosphere. It then combines with hemoglobin to form carbaminohemoglobin but most of it is carried in the form of bicarbonate.
C)   Carbon dioxide enters the bloodstream from the tissues. It then combines with hydrogen ions to form bicarbonate ion but most of it is carried in the form of carbaminohemoglobin.
D)   Carbon dioxide enters the bloodstream from the tissues. It then combines with hemoglobin to form bicarbonate ion but most of it is carried in the form of carbaminohemoglobin in the bloodstream.
E)   Carbon dioxide enters the bloodstream from the atmosphere. It then combines with water to form carbonic acid but most of it is carried in the form of bicarbonate.F) A) and D)
G) C) and E)

Question 13

When nerve impulses pass to the diaphragm, the diaphragm relaxes and exhalation occurs.

Accepted Answer

A) True 
 B)False

Question 14

Which statement is NOT true about the human respiratory system?

Accepted Answer

A)   The glottis is closed by the forward movement of the soft palate during swallowing.
B)   The glottis is the passageway through the larynx by which air enters the trachea.
C)   Food and air both enter the pharynx, presenting a potential danger to respiration.
D)   Air reaching the lungs has been warmed to body temperature by passage through the nose and upper respiratory passageways.
E)   Cilia and hairs in the nose help to filter out foreign materials in the air.F) A) and B)
G) C) and D)

Question 15

Ventilation causes alveoli of the lungs to have _______ the blood in pulmonary capillaries.

Accepted Answer

A)   a lower PO2 and a higher PCO2 than
B)   the same PO2 and PCO2 as
C)   a higher PO2 and a lower PCO2 than
D)   No answer is correct.E) A) and D)
F) None of the above

Question 16

Explain the correct sequence of structures that a molecule of oxygen will pass through or over as it moves from the nostrils to the alveolus.

Accepted Answer

The correct sequence of airflo...

Question 17

If an individual wanted to hold their breath underwater for a long period of time they would breath very rapidly prior to the dive. What does this accomplish?

Accepted Answer

A)   They would increase the amount of CO2 in their bloodstream which would cause them to temporarily stop breathing.
B)   They would decrease the amount of CO2 in their bloodstream which would cause them to temporarily stop breathing.
C)   They would increase the amount of H+ in their bloodstream which would cause them to temporarily stop breathing.
D)   They would decrease the amount of H+ in their bloodstream which would cause them to temporarily stop breathing.E) C) and D)
F) A) and B)

Question 18

A pressurized airplane cabin and an oxygen tent over a patient in a hospital both impact the respiration rate of a person. How do these compare?

Accepted Answer

A)   The oxygen tent and the airplane increase the air pressure to increase the PCO2.
B)   The oxygen tent and airplane cabin pressure lowers the partial pressures for normal breathing.
C)   Both use the same mechanism to force hemoglobin to increase affinity for oxygen.
D)   The oxygen tent increases concentration of O2 while the airplane maintains total air pressure without changing concentrations.E) A) and B)
F) A) and C)

Question 19

Which part of the respiratory system is an air tube held open by a series of C-shaped cartilaginous rings?

Accepted Answer

A)   pharynx
B)   larynx
C)   trachea
D)   bronchiolesE) A) and B)
F) A) and C)

Question 20

Gills are used in respiration by all of the following aquatic animals EXCEPT

Accepted Answer

A)   clams.
B)   fishes.
C)   crabs.
D)   polychaete worms.E) A) and D)
F) A) and C)

Exam 35: Respiratory Systems

Which of the following increases the surface area available for gas exchange among various organisms?

Correct AnswerverifiedShow Answer

Trace the path of an inhaled air molecule in a human being.

Correct AnswerverifiedShow Answer

Which of these organisms is able to use several body surfaces, such as gills, skin, and lungs, for respiration?

Correct AnswerverifiedShow Answer

Common colds are upper respiratory tract infections. Why are vaccinations against the common cold not practical?

Correct AnswerverifiedShow Answer

When nerve impulses pass to the diaphragm, the diaphragm relaxes and exhalation occurs.

Correct AnswerverifiedShow Answer

Carbonic anhydrase

Correct AnswerverifiedShow Answer

Which statement is correct about how carbon dioxide is carried in the bloodstream?

Correct AnswerverifiedShow Answer

Explain what happens when carbonic acid associates with carbonic anhydrase and how this can impact the blood pH.

Correct AnswerverifiedWhen carbonic acid associates with carbo...View AnswerShow Answer

Which part of the respiratory system is an air tube held open by a series of C-shaped cartilaginous rings?

Correct AnswerverifiedShow Answer

The iron in a hemoglobin molecule is actually what binds the oxygen.

Correct AnswerverifiedShow Answer

Which features are required for efficient external respiration to take place?

Correct AnswerverifiedShow Answer

Explain the correct sequence of structures that a molecule of oxygen will pass through or over as it moves from the nostrils to the alveolus.

Correct AnswerverifiedThe correct sequence of airflo...View AnswerShow Answer

Which of the following respiratory disorders might be cured in the future through the use of gene therapy?

Correct AnswerverifiedShow Answer

A disease in which the alveoli are distended and their walls damaged so that surface areas for gas exchange is reduced is

Correct AnswerverifiedShow Answer

A pressurized airplane cabin and an oxygen tent over a patient in a hospital both impact the respiration rate of a person. How do these compare?

Correct AnswerverifiedShow Answer

Gills are used in respiration by all of the following aquatic animals EXCEPT

Correct AnswerverifiedShow Answer

Which statement is NOT true about the human respiratory system?

Correct AnswerverifiedShow Answer

Ventilation causes alveoli of the lungs to have _______ the blood in pulmonary capillaries.

Correct AnswerverifiedShow Answer

Opercula are

Correct AnswerverifiedShow Answer

If an individual wanted to hold their breath underwater for a long period of time they would breath very rapidly prior to the dive. What does this accomplish?

Correct AnswerverifiedShow Answer

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When carbonic acid associates with carbo...
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The correct sequence of airflo...
View Answer

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