Question 1

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 2

The partial pressure exerted by oxygen in a liquid is called oxygen tension.

Accepted Answer

A) True 
 B)False

Question 3

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 4

There is one iron atom in one heme group.

Accepted Answer

A) True 
 B)False

Question 5

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.

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

The PCO₂ in alveolar air is _____ blood.

Accepted Answer

A)  less than in the systemic venous 
B)  greater than in the systemic venous 
C)  equal to the systemic arterial 
D)  Both A and C are correct. 
A)  less than in the systemic venous 
B)  greater than in the systemic venous 
C)  equal to the systemic arterial 
D)  Both A and C are correct.

Question 8

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 9

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 10

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 11

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 12

Carbonic acid forms when carbon dioxide reacts with water in the blood plasma.

Accepted Answer

A) True 
 B)False

Question 13

The major form by which carbon dioxide is transported in the circulatory system is:

Accepted Answer

A)  in solution. 
B)  as bicarbonate ions. 
C)  as carbaminohemoglobin. 
D)  none of the above. 
A)  in solution. 
B)  as bicarbonate ions. 
C)  as carbaminohemoglobin. 
D)  none of the above.

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

Hemoglobin can carry oxygen more efficiently than it can carry carbon dioxide because all four polypeptide chains can carry oxygen, but only the beta chain can carry carbon dioxide.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not a means of transporting oxygen in the blood?

Accepted Answer

A)  As oxyhemoglobin 
B)  Combined with the bicarbonate ion (HCO3-) 
C)  Dissolved in the plasma 
D)  All of the above are used to transport oxygen in the blood. 
A)  As oxyhemoglobin 
B)  Combined with the bicarbonate ion (HCO3-) 
C)  Dissolved in the plasma 
D)  All of the above are used to transport oxygen in the blood.

Question 17

Each hemoglobin molecule can carry how many oxygen molecules?

Accepted Answer

A)  One 
B)  Two 
C)  Four 
D)  Eight 
A)  One 
B)  Two 
C)  Four 
D)  Eight

Question 18

White blood cells do not have a role in oxygen transport.

Accepted Answer

A) True 
 B)False

Question 19

About 10% of the carbon dioxide carried in the blood is simply dissolved in the plasma.

Accepted Answer

A) True 
 B)False

Question 20

The chloride shift is an important step of oxygen transport in the blood.

Accepted Answer

A) True 
 B)False

Exam 37: Gas Exchange & Transport

Each hemoglobin molecule can carry how many carbon dioxide molecules?

The partial pressure exerted by oxygen in a liquid is called oxygen tension.

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

There is one iron atom in one heme group.

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:

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

The PCO₂ in alveolar air is _____ 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.

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

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

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

Carbonic acid forms when carbon dioxide reacts with water in the blood plasma.

The major form by which carbon dioxide is transported in the circulatory system is:

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

Hemoglobin can carry oxygen more efficiently than it can carry carbon dioxide because all four polypeptide chains can carry oxygen, but only the beta chain can carry carbon dioxide.

Which of the following is not a means of transporting oxygen in the blood?

Each hemoglobin molecule can carry how many oxygen molecules?

White blood cells do not have a role in oxygen transport.

About 10% of the carbon dioxide carried in the blood is simply dissolved in the plasma.

The chloride shift is an important step of oxygen transport in the blood.

Organization of the Body

Homeostasis

Chemical Basis of Life

Biomolecules

Cell Structure

Cell Function

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Muscle Contraction

Nervous System Cells

Nerve Signaling

Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

General Senses

Special Senses

Endocrine Regulation

Endocrine Glands

Blood

Heart

Blood Vessels

Circulation of the Blood

Lymphatic System

Innate Immunity

Adaptive Immunity

Stress

Respiratory Tract

Ventilation

Upper Digestive Tract

Lower Digestive Tract

Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid Base Balance

Male Reproductive System

Female Reproductive System

Growth and Development

Genetics and Heredity

Filters