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.

Question

Quizplus · Accepted Answer

A) Blood coming into the pulmonary capillaries is low in O2 and high in CO2 because it has just been pumped from the body and is returning to the lungs to be oxygenated.
B) The alveolar walls are one cell in thickness, allowing for easy diffusion of gases between the alveoli and capillaries.
C) The total alveoli provide a large surface area for gas exchange, which increases the efficiency of gas exchange.
D) The pulmonary capillaries are made of simple squamous epithelium, which allows for easy diffusion of gases.
E) Type II alveolar cells secrete pulmonary surfactant to reduce surface tension in the alveoli and prevent them from collapsing.
F) Blood leaving the pulmonary capillaries will return to the left atrium of the heart to be pumped into systemic circulation.

Which of the Following Statements Are True of the Alveoli