In an organism, the osmotic pressure in the capillaries of the systemic tissues

Question

In an organism, the osmotic pressure in the capillaries of the systemic tissues is found to be constant at -18 mm Hg along the entire length of the capillaries. The blood pressure at the arteriole end of the capillaries is +40 mm Hg and the pressure at the venule end of the capillaries is +35 mm Hg. Which of the following statements is TRUE in this organism?

a. There is a net secretion of fluid from the capillaries into surrounding tissues at the arteriole end of the capillaries but not at the venule end.

b. There is a net secretion of fluid from the capillaries into surrounding tissues at the venule end of the capillaries but not at the arteriole end.

c. There is a net uptake of fluid into the capillaries along the entire length of the systemic capillaries

d. There is a net secretion of fluid from the capillaries along the entire length of the systemic capillaries

Explanation / Answer

I believe the correct option to be:

a. There is a net secretion of fluid from the capillaries into surrounding tissues at the arteriole end of the capillaries but not at the venule end.

as pressure at artriole end is higher so fluid will move out and since the pressure at venuele is lower, the fluids will be absorbed.

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