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Oxygen and Carbon Dioxide Transport in the Respiratory System

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Oxygen and Carbon Dioxide Transport in the Respiratory System

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Questions and Answers

What percentage of CO2 in blood is dissolved?

50%

40%

20%

30% (correct)

Which statement describes the Bohr Effect?

Acidosis increases the affinity of hemoglobin for CO2

CO2 decreases hemoglobin affinity for O2 (correct)

CO2 and acidosis increase hemoglobin affinity for O2

O2 increases hemoglobin affinity for CO2

What characterizes Diffusion Limited Transport of oxygen?

Rapid and complete equilibrium between PAo2 and Pao2

O2 diffusion is complete after RBC traversal

Impediment to diffusion across the alveolar capillary membrane (correct)

Ability of blood to take on more oxygen is limited

How does the Haldane effect impact hemoglobin affinity?

O2 decreases hemoglobin affinity for CO2 (B) Signup and view all the answers

What are the key requirements for adequate gas exchange in the lungs?

Adequate ventilation and perfusion (A) Signup and view all the answers

In human lung disease, what is identified as the most important cause of gas exchange abnormalities?

Nonuniform distribution of ventilation (D) Signup and view all the answers

Where does gas exchange predominantly occur in the human respiratory system?

Alveoli (B) Signup and view all the answers

What is the total surface area of the alveoli in adults for efficient gas exchange?

75 M2 (A) Signup and view all the answers

What is the primary method of O2 and CO2 transport across the alveolar-capillary membrane?

Passive diffusion (C) Signup and view all the answers

In blood, approximately what percentage of O2 is carried in a dissolved state?

95% (C) Signup and view all the answers

Which factors move the oxyhemoglobin dissociation curve to the right, decreasing hemoglobin affinity for O2?

Acidosis, increased Pco2, increased temperature (A) Signup and view all the answers

What is one of the determinants of blood oxygen content according to the text?

Lung function (Po2) (A) Signup and view all the answers