Question 1

The partial pressure of oxygen in an artery is always lower than the partial pressure of oxygen in a vein.

Accepted Answer

A) True 
 B)False

Question 2

One hundred milliliters of arterial blood contains approximately what volume percent of oxygen?

Accepted Answer

A) 10% 
B) 15% 
C) 20% 
D) 25% 
A) 10% 
B) 15% 
C) 20% 
D) 25%

Question 3

The transport of carbon dioxide will tend to lower blood pH.

Accepted Answer

A) True 
 B)False

Question 4

Explain why less oxygen would enter the blood at a high altitude than would enter the blood at sea level.

Accepted Answer

At high altitudes, the air pressure is l

Question 5

Increased cellular activity would decrease the carbon dioxide gradient between the cells and the arterial blood.

Accepted Answer

A) True 
 B)False

Question 6

To produce the highest possible oxygen concentration in the blood, gas exchange occurs in only one direction at the respiratory membrane-from the lung to the blood.

Accepted Answer

A) True 
 B)False

Question 7

Each hemoglobin molecule can carry how many carbon dioxide molecules?

Accepted Answer

A) Two 
B) Four 
C) Eight 
D) Hemoglobin cannot carry carbon dioxide molecules. 
A) Two 
B) Four 
C) Eight 
D) Hemoglobin cannot carry carbon dioxide molecules.

Question 8

Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture.

Accepted Answer

A) inversely related to the concentration of that gas in the mixture and 
B) directly related to the concentration of that gas in the mixture and 
C) directly related to the concentration of that gas in the mixture and inversely related 
D) inversely related to the concentration of that gas in the mixture and directly related 
A) inversely related to the concentration of that gas in the mixture and 
B) directly related to the concentration of that gas in the mixture and 
C) directly related to the concentration of that gas in the mixture and inversely related 
D) inversely related to the concentration of that gas in the mixture and directly related

Question 9

Carbon dioxide is carried in three forms in the blood. Ranking them from greatest to least amount carried, the sequence would be:

Accepted Answer

A) dissolved in the plasma, carbaminohemoglobin, and bicarbonate ion. 
B) carbaminohemoglobin, bicarbonate ion, and dissolved in plasma. 
C) bicarbonate ion, dissolved in plasma, and carbaminohemoglobin. 
D) bicarbonate ion, carbaminohemoglobin, and dissolved in plasma. 
A) dissolved in the plasma, carbaminohemoglobin, and bicarbonate ion. 
B) carbaminohemoglobin, bicarbonate ion, and dissolved in plasma. 
C) bicarbonate ion, dissolved in plasma, and carbaminohemoglobin. 
D) bicarbonate ion, carbaminohemoglobin, and dissolved in plasma.

Question 10

Increased cellular activity would increase the oxygen gradient between the cells and the arterial blood.

Accepted Answer

A) True 
 B)False

Question 11

In the lung as the partial pressure of oxygen of the blood goes up, the partial pressure of oxygen in the alveolar air goes down proportionally.

Accepted Answer

A) True 
 B)False

Question 12

Because of tissue layers between alveolar air and the blood supply, arterial blood PO₂ is always less than alveolar PO₂.

Accepted Answer

A) True 
 B)False

Question 13

Oxygenated blood contains equal amounts of both dissolved oxygen and oxygen combined with hemoglobin.

Accepted Answer

A) True 
 B)False

Question 14

About 20% of the carbon dioxide that is carried in the blood is carried on hemoglobin attached to the acid group of an amino acid.

Accepted Answer

A) True 
 B)False

Question 15

A drop in the body's production of carbonic anhydrase would hinder the formation of:

Accepted Answer

A) carbonic acid. 
B) oxyhemoglobin. 
C) carbaminohemoglobin. 
D) All of the above are correct. 
A) carbonic acid. 
B) oxyhemoglobin. 
C) carbaminohemoglobin. 
D) All of the above are correct.

Question 16

The enzyme in blood plasma that helps form carbaminohemoglobin is carbonic anhydrase.

Accepted Answer

A) True 
 B)False

Question 17

If the PCO₂ is greater in the cells than in the intercellular fluid, CO₂ will remain in the cells.

Accepted Answer

A) True 
 B)False

Question 18

Under usual conditions, the oxygen saturation of systemic venous blood is 75%.

Accepted Answer

A) True 
 B)False

Question 19

For cells to get oxygen, they must have an oxygen partial pressure lower than the arterial blood serving them.

Accepted Answer

A) True 
 B)False

Question 20

If a person were skiing high up in the mountains, she might feel that she is having trouble breathing (getting enough oxygen in her blood). This is because the:

Accepted Answer

A) thoracic cavity has a difficult time lowering the internal pressure below the lower atmospheric pressure. 
B) lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is less. 
C) lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is greater. 
D) physiological dead air space increases and atmospheric pressure decreases. 
A) thoracic cavity has a difficult time lowering the internal pressure below the lower atmospheric pressure. 
B) lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is less. 
C) lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is greater. 
D) physiological dead air space increases and atmospheric pressure decreases.

Exam 37: Gas Exchange Transport

The partial pressure of oxygen in an artery is always lower than the partial pressure of oxygen in a vein.

One hundred milliliters of arterial blood contains approximately what volume percent of oxygen?

The transport of carbon dioxide will tend to lower blood pH.

Explain why less oxygen would enter the blood at a high altitude than would enter the blood at sea level.

Increased cellular activity would decrease the carbon dioxide gradient between the cells and the arterial blood.

To produce the highest possible oxygen concentration in the blood, gas exchange occurs in only one direction at the respiratory membrane-from the lung to the blood.

Each hemoglobin molecule can carry how many carbon dioxide molecules?

Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture.

Carbon dioxide is carried in three forms in the blood. Ranking them from greatest to least amount carried, the sequence would be:

Increased cellular activity would increase the oxygen gradient between the cells and the arterial blood.

In the lung as the partial pressure of oxygen of the blood goes up, the partial pressure of oxygen in the alveolar air goes down proportionally.

Because of tissue layers between alveolar air and the blood supply, arterial blood PO₂ is always less than alveolar PO₂.

Oxygenated blood contains equal amounts of both dissolved oxygen and oxygen combined with hemoglobin.

About 20% of the carbon dioxide that is carried in the blood is carried on hemoglobin attached to the acid group of an amino acid.

A drop in the body's production of carbonic anhydrase would hinder the formation of:

The enzyme in blood plasma that helps form carbaminohemoglobin is carbonic anhydrase.

If the PCO₂ is greater in the cells than in the intercellular fluid, CO₂ will remain in the cells.

Under usual conditions, the oxygen saturation of systemic venous blood is 75%.

For cells to get oxygen, they must have an oxygen partial pressure lower than the arterial blood serving them.

If a person were skiing high up in the mountains, she might feel that she is having trouble breathing (getting enough oxygen in her blood). This is because the:

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