Gas exchange at the respiratory membrane is efficient because
A. the difference in partial pressures is substantial.
B. the distances involved in exchange are small.
C. the total surface area of the membrane is large.
D. blood flow and air flow are coordinated (blood flow is highest around alveoli with highest Po2).
E. All of these are correct.
Ans: E. All of these are correct.
You might also like to view...
The anterior pituitary secretes:
a. TSH b. oxytocin c. ADH d. all of the above
Myofibers in cardiac muscle contain more mitochondria than skeletal muscle
Indicate whether the statement is true or false
Which of the following organelles serves as the site of protein synthesis?
A)mitochondrion B)ribosome C)centriole D)Golgi apparatus E)lysosome
________ is the main form in which Carbon dioxide is carried in the blood
A- Carbonic anhydrase B- Carbonic acid C- Carbon dioxide D- Bicarbonate ion