Question 1

An elephant uses its trunk

Accepted Answer

A)  to pluck leaves from trees. 
B)  to pull plants from the ground. 
C)  to obtain water to squirt in its mouth. 
D)  as a snorkel. 
E)  All of the above 
A)  to pluck leaves from trees. 
B)  to pull plants from the ground. 
C)  to obtain water to squirt in its mouth. 
D)  as a snorkel. 
E)  All of the above

Question 2

_______ is a genetic disease in which respiratory problems result from thick, dehydrated mucus.

Accepted Answer

The answer of _______ is a genetic disease in which...

Question 3

Due to the activity of carbonic anhydrase, within the lung there is a concentration gradient of CO2 from the erythrocyte to the _______, and a concentration gradient of _______ from the plasma to the _______.

Accepted Answer

A)  plasma; HCO3-; plasma 
B)  plasma; HCO3-; lung 
C)  lung; CO2; lung 
D)  lung; HCO3-; erythrocyte 
E)  lung; HCO3-; lung 
A)  plasma; HCO3-; plasma 
B)  plasma; HCO3-; lung 
C)  lung; CO2; lung 
D)  lung; HCO3-; erythrocyte 
E)  lung; HCO3-; lung

Question 4

If a new air pollutant were to destroy the surfactant in people's lungs, what effects might be expected?

Accepted Answer

A)  Increased surface tension of the fluid lining the alveoli 
B)  Increased uptake of CO2 from the environment 
C)  Increased effort needed to breathe 
D)  Decreased levels of hydrogen bonding in the fluid of the alveoli. 
E)  Both a and c 
A)  Increased surface tension of the fluid lining the alveoli 
B)  Increased uptake of CO2 from the environment 
C)  Increased effort needed to breathe 
D)  Decreased levels of hydrogen bonding in the fluid of the alveoli. 
E)  Both a and c

Question 5

Which of the following organisms does not require both external ventilation of its respiratory surfaces with the medium containing O2 and internal ventilation of its respiratory surfaces with blood?

Accepted Answer

A)  Crayfish 
B)  Rabbit 
C)  Insect 
D)  Squid 
E)  Bird 
A)  Crayfish 
B)  Rabbit 
C)  Insect 
D)  Squid 
E)  Bird

Question 6

The gas exchange system of _______ includes air sacs that communicate with the lungs with air flowing unidirectionally.

Accepted Answer

A)  insects 
B)  fish 
C)  amphibians 
D)  birds 
E)  mammals 
A)  insects 
B)  fish 
C)  amphibians 
D)  birds 
E)  mammals

Question 7

Which of the following represents the correct air pathway during inhalation?

Accepted Answer

A)  Pharynx, trachea, larynx, bronchi, alveoli 
B)  Larynx, trachea, pharynx, bronchi, alveoli 
C)  Trachea, larynx, pharynx, bronchi, alveoli 
D)  Trachea, larynx, pharynx, alveoli, bronchi 
E)  Pharynx, trachea, bronchi, larynx, alveoli 
A)  Pharynx, trachea, larynx, bronchi, alveoli 
B)  Larynx, trachea, pharynx, bronchi, alveoli 
C)  Trachea, larynx, pharynx, bronchi, alveoli 
D)  Trachea, larynx, pharynx, alveoli, bronchi 
E)  Pharynx, trachea, bronchi, larynx, alveoli

Question 8

Why would you be more likely to find birds than mammals at high altitudes?

Accepted Answer

Birds have an extremely efficient respir

Question 9

When humans have acclimated to high altitudes, their hemoglobin

Accepted Answer

A)  is more saturated with O2. 
B)  delivers more O2 to tissues as the level of BPG increases. 
C)  is more concentrated in red blood cells. 
D)  shifts its O2-binding curve to the left. 
E)  resembles fetal hemoglobin in terms of its O2-binding function. 
A)  is more saturated with O2. 
B)  delivers more O2 to tissues as the level of BPG increases. 
C)  is more concentrated in red blood cells. 
D)  shifts its O2-binding curve to the left. 
E)  resembles fetal hemoglobin in terms of its O2-binding function.

Exam 49: Gas Exchange in Animals

An elephant uses its trunk

_______ is a genetic disease in which respiratory problems result from thick, dehydrated mucus.

Due to the activity of carbonic anhydrase, within the lung there is a concentration gradient of CO2 from the erythrocyte to the _______, and a concentration gradient of _______ from the plasma to the _______.

If a new air pollutant were to destroy the surfactant in people's lungs, what effects might be expected?

Which of the following organisms does not require both external ventilation of its respiratory surfaces with the medium containing O2 and internal ventilation of its respiratory surfaces with blood?

The gas exchange system of _______ includes air sacs that communicate with the lungs with air flowing unidirectionally.

Which of the following represents the correct air pathway during inhalation?

Why would you be more likely to find birds than mammals at high altitudes?

When humans have acclimated to high altitudes, their hemoglobin

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Due to the activity of carbonic anhydrase, within the lung there is a concentration gradient of CO₂ from the erythrocyte to the ___, and a concentration gradient of _ from the plasma to the _____.

Which of the following organisms does not require both external ventilation of its respiratory surfaces with the medium containing O₂ and internal ventilation of its respiratory surfaces with blood?