All respitory surfaces have to be what for efficient uptake of respitory gases?

Question

a. moist

b. a large surface area

c. a large network of capillaries

d. a and b

e. a b and c

Answer 1

If you're refering to mammals like us, then the best answer is :e[a,b,& c]. Our lungs are designed for max efficiency and therefore our airways are branched out ever finer, from bronchioles, down to the smallest aveoli. With each branching the total surface area increases exponentially; thereby maximizing contact w/the capillaries resulting in exchange of blood gases(O2 for CO2). Moisture is necessary, not only for the actual exchange of gases, but to cleanse the lungs for dust & particulate matter (including bacteria) that we breathe in.A good example of lung fxn going bad is emphysema in which those aveoli break down, decreasing surface area & the amt of gases exchanged

Answer 2

Answer ="e".

In addition they must be thin and permeable and well ventilated.

Answer 3

The answer is e.  The reasons: moist because oxygen and carbon dioxide need to be exchanged, large surface area so that they have more area that is moist and has capillaries, and the large network of capillaries increases the amount of oxygen uptake because more blood = more iron to bind oxygen.