Question 1

The variables of oxygen consumption,cardiac output,and blood oxygen content are unrelated.

Accepted Answer

A) True 
 B)False

Question 2

Match the factor with its effect on the affinity of hemoglobin for oxygen.
-increased PCO2

Accepted Answer

A)  increase
B)  decreaseC) A) and B)
D) undefined

Question 3

Name three pathological changes that adversely affect gas exchange.

Accepted Answer

1.a decrease in the amount of alveolar s...

Question 4

Match the lung disease to its description.
-destruction of alveoli

Accepted Answer

A)  fibrotic lung disease
B)  emphysema
C)  asthma
D)  pulmonary edemaE) A) and D)
F) B) and C)

Question 5

Define hyperventilation and explain what may cause it.Is the increased ventilation that occurs while exercising an example of hyperventilation? Explain your answer.How are PO2 and PCO2 affected by hyperventilation? Can breathing into a paper bag remedy hyperventilation or is this just unfounded folk medicine? Explain.

Accepted Answer

Hyperventilation is an increase in alveo...

Question 6

You are a scientist who has been hired to write a screenplay for a popular TV series.The plot involves the discovery by a rogue botanist of a plant toxin that interferes with the function of the exchange pump responsible for the chloride shift.This scientist provides the toxin to bioterrorists.What should you write for the coroner to say about symptoms in the poisoning victims?

Accepted Answer

The chloride shift is the transport proc...

Question 7

The Hering-Breuer reflex

Accepted Answer

A)   functions to increase ventilation with changes in blood pressure.
B)   alters pulmonary ventilation when the PO2 changes.
C)   alters pulmonary ventilation when the PCO2 changes.
D)   prevents overexpansion of the lungs.
E)   is an important aspect of normal, quiet breathing.F) B) and D)
G) A) and B)

Question 8

List and explain the factors that influence gas diffusion in the lungs.

Accepted Answer

Concentration gradient,surface area,memb...

Question 9

Explain how oxygen and carbon dioxide are transported in the blood.How does the means of transport relate to the solubility and chemical reactivity of these gases in plasma?

Accepted Answer

Oxygen is not highly soluble in water,wh...

Question 10

The partial pressure of oxygen in arterial blood is approximately ________ mm Hg.

Accepted Answer

A)   40
B)   45
C)   50
D)   70
E)   100F) B) and C)
G) C) and E)

Question 11

Of the factors that influence diffusion of respiratory gases,the most variable and,therefore,important factor to consider is the

Accepted Answer

A)   concentration gradient.
B)   diffusion distance.
C)   membrane surface area.
D)   membrane thickness.
E)   electrical charge.F) B) and C)
G) C) and E)

Question 12

A molecule that blocks the activity of carbonic anhydrase would

Accepted Answer

A)   interfere with oxygen binding to hemoglobin.
B)   cause an increase in blood pH.
C)   increase the amount of bicarbonate formed in the blood.
D)   decrease the amount of carbon dioxide dissolved in the plasma.
E)   All of the answers are correct.F) None of the above
G) C) and D)

Question 13

High carbon dioxide concentration in body fluids is called

Accepted Answer

A)   carbonation.
B)   hyperdioxia.
C)   hyperoxia.
D)   hypercarbia.
E)   hypercapnia.F) A) and B)
G) A) and E)

Question 14

Generally,PCO2 in arterial blood is ________ than PCO2 in venous blood.

Accepted Answer

Question 15

What are the three ways CO2 is transported in blood? Approximately what percentage is transported by each way?

Accepted Answer

1.attached to hemogl...

Question 16

Match the factor with its effect on the affinity of hemoglobin for oxygen.
-increased 2,3-DPG

Accepted Answer

A)  increase
B)  decreaseC) A) and B)
D) undefined

Question 17

What force(s)move(s)carbon dioxide from the blood into the alveoli?

Accepted Answer

Carbon dioxide moves...

Question 18

Match the lung disease to its description.
-increased diffusion distance

Accepted Answer

A)  fibrotic lung disease
B)  emphysema
C)  asthma
D)  pulmonary edemaE) A) and C)
F) B) and C)

Question 19

The chloride shift occurs when

Accepted Answer

A)   hydrogen ions leave the red blood cells.
B)   hydrogen ions enter the red blood cells.
C)   bicarbonate ions enter the red blood cells.
D)   bicarbonate ions leave the red blood cells.
E)   carbonic acid is formed.F) C) and D)
G) C) and E)

Question 20

In the medulla oblongata,the nucleus tractus solitarius contains the ________ of neurons.

Accepted Answer

A)   pontine respiratory group
B)   ventral respiratory group
C)   dorsal respiratory group
D)   pre-Botzinger complexE) None of the above
F) A) and C)

Exam 18: Gas Exchange and Transport

Explain how oxygen and carbon dioxide are transported in the blood.How does the means of transport relate to the solubility and chemical reactivity of these gases in plasma?

Correct Answer
verified
Oxygen is not highly soluble in water,wh...
View Answer

Name three pathological changes that adversely affect gas exchange.

Correct Answer
verified
1.a decrease in the amount of alveolar s...
View Answer

The variables of oxygen consumption,cardiac output,and blood oxygen content are unrelated.

Correct Answer
verified

Match the lung disease to its description. -increased diffusion distance

Correct Answer
verified

In the medulla oblongata,the nucleus tractus solitarius contains the ________ of neurons.

Correct Answer
verified

The partial pressure of oxygen in arterial blood is approximately ________ mm Hg.

Correct Answer
verified

High carbon dioxide concentration in body fluids is called

Correct Answer
verified

Match the factor with its effect on the affinity of hemoglobin for oxygen. -increasedP_CO₂

Correct Answer
verified

Generally,P_CO₂ in arterial blood is ________ than P_CO₂ in venous blood.

Correct Answer
verified

What force(s)move(s)carbon dioxide from the blood into the alveoli?

Correct Answer
verified
Carbon dioxide moves...
View Answer

The Hering-Breuer reflex

Correct Answer
verified

Match the factor with its effect on the affinity of hemoglobin for oxygen. -increased 2,3-DPG

Correct Answer
verified

A molecule that blocks the activity of carbonic anhydrase would

Correct Answer
verified

What are the three ways CO₂ is transported in blood? Approximately what percentage is transported by each way?

Correct Answer
verified
1.attached to hemogl...
View Answer

Match the lung disease to its description. -destruction of alveoli

Correct Answer
verified

Of the factors that influence diffusion of respiratory gases,the most variable and,therefore,important factor to consider is the

Correct Answer
verified

The chloride shift occurs when

Correct Answer
verified

Correct Answer
verified
Hyperventilation is an increase in alveo...
View Answer

Correct Answer
verified
The chloride shift is the transport proc...
View Answer

List and explain the factors that influence gas diffusion in the lungs.

Correct Answer
verified
Concentration gradient,surface area,memb...
View Answer

Exam 18: Gas Exchange and Transport

Explain how oxygen and carbon dioxide are transported in the blood.How does the means of transport relate to the solubility and chemical reactivity of these gases in plasma?

Correct AnswerverifiedOxygen is not highly soluble in water,wh...View AnswerShow Answer

Name three pathological changes that adversely affect gas exchange.

Correct Answerverified1.a decrease in the amount of alveolar s...View AnswerShow Answer

The variables of oxygen consumption,cardiac output,and blood oxygen content are unrelated.

Correct AnswerverifiedShow Answer

Match the lung disease to its description. -increased diffusion distance

Correct AnswerverifiedShow Answer

In the medulla oblongata,the nucleus tractus solitarius contains the ________ of neurons.

Correct AnswerverifiedShow Answer

The partial pressure of oxygen in arterial blood is approximately ________ mm Hg.

Correct AnswerverifiedShow Answer

High carbon dioxide concentration in body fluids is called

Correct AnswerverifiedShow Answer

Match the factor with its effect on the affinity of hemoglobin for oxygen. -increased PCO2

Correct AnswerverifiedShow Answer

Generally,PCO2 in arterial blood is ________ than PCO2 in venous blood.

Correct AnswerverifiedShow Answer

What force(s)move(s)carbon dioxide from the blood into the alveoli?

Correct AnswerverifiedCarbon dioxide moves...View AnswerShow Answer

The Hering-Breuer reflex

Correct AnswerverifiedShow Answer

Match the factor with its effect on the affinity of hemoglobin for oxygen. -increased 2,3-DPG

Correct AnswerverifiedShow Answer

A molecule that blocks the activity of carbonic anhydrase would

Correct AnswerverifiedShow Answer

What are the three ways CO2 is transported in blood? Approximately what percentage is transported by each way?

Correct Answerverified1.attached to hemogl...View AnswerShow Answer

Match the lung disease to its description. -destruction of alveoli

Correct AnswerverifiedShow Answer

Of the factors that influence diffusion of respiratory gases,the most variable and,therefore,important factor to consider is the

Correct AnswerverifiedShow Answer

The chloride shift occurs when

Correct AnswerverifiedShow Answer

Correct AnswerverifiedHyperventilation is an increase in alveo...View AnswerShow Answer

Correct AnswerverifiedThe chloride shift is the transport proc...View AnswerShow Answer

List and explain the factors that influence gas diffusion in the lungs.

Correct AnswerverifiedConcentration gradient,surface area,memb...View AnswerShow Answer

Correct Answer
verified
Oxygen is not highly soluble in water,wh...
View Answer

Correct Answer
verified
1.a decrease in the amount of alveolar s...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Match the factor with its effect on the affinity of hemoglobin for oxygen. -increasedP_CO₂

Correct Answer
verified

Generally,P_CO₂ in arterial blood is ________ than P_CO₂ in venous blood.

Correct Answer
verified

Correct Answer
verified
Carbon dioxide moves...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What are the three ways CO₂ is transported in blood? Approximately what percentage is transported by each way?

Correct Answer
verified
1.attached to hemogl...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Hyperventilation is an increase in alveo...
View Answer

Correct Answer
verified
The chloride shift is the transport proc...
View Answer

Correct Answer
verified
Concentration gradient,surface area,memb...
View Answer