Which of the following features of the alveolar sacs allows for the ease of diffusion of gasses?
A) Type II alveolar cells secrete surfactant.
B) They are made of a single layer of simple squamous epithelium.
C) They are made of a single layer of simple squamous epithelium and elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.
D) Elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.
B) They are made of a single layer of simple squamous epithelium.
You might also like to view...
When holding the lead rope, it is best to wrap the end of the lead around the hand or wrist for better control
Indicate whether the statement is true or false
The adrenal medulla is actually a modified part of the sympathetic nervous system
Indicate whether the statement is true or false
The middle ear communicates with the nasopharynx through the
-membranous labyrinth. -auditory tube or Eustachian tube. -auricle. -bony labyrinth. -auditory meatus.
Most potassium loss from the body occurs through
A. sweat. B. respiration. C. urine. D. feces.