Diffusion rate across the respiratory membrane is rapid because ________.
A. alveoli are one cell thick
B. there are about 750 square feet of alveoli membrane
C. the air-blood barrier is two cells thick
D. All of the choices are correct.
Answer: D
You might also like to view...
If a cell lacked centrioles, it probably would not be able to
A) move. B) produce DNA. C) divide. D) synthesize proteins. E) metabolize sugars.
White blood cells are produced through the action of colony-stimulating factors
Indicate whether the statement is true or false
Which of the following directly stems from the ascending aorta before it branches into the circumflex branch and anterior interventricular branch?
A. Left coronary artery B. Left coronary vein C. Great cardiac vein D. Right coronary vein E. Right coronary artery
Collections of specialized cells and extra-cellular substances around them are known as a(n) ______
A. organelle B. tissue C. organ D. organism