Which of the Following Statements Are True of the Alveoli

question 4

Multiple Choice

Which of the following statements are true of the alveoli and pulmonary capillaries (Select all that apply) ?

• A)Blood coming into the pulmonary capillaries is low in O2 and high in CO2.
• B)The alveolar walls are one cell in thickness.
• C)The total alveoli provide a large surface area for gas exchange.
• D)The pulmonary capillaries are made of simple squamous epithelium.
• E)Type II alveolar cells secrete pulmonary surfactant to increase the osmosis of gases.
• F)Blood leaving the pulmonary capillaries will return to the left atrium of the heart.