Left:o:14.13 Question 7 (1 point) Which of the following characteristics of tiss

Question

Left:o:14.13 Question 7 (1 point) Which of the following characteristics of tissue perfusion are expressed correctly (Choose all that apply)? colloid osmotic pressure (oncotic pressure) of the blood plasma is greater than the 1) interstitium 2) fluid moves into the tissues by absorption 3) net filtration takes place on the arterial side of the capillaries 4) capillaries recover all of the fluid that flows into the tissues 5) protein in the interstial fluid is the basis of colloid osmotic pressure filtration is driven by mean arterial blood pressure 6)

Explanation / Answer

1) Blood colloidal osmotic pressure of plasma is not greater than that of interstitium. BCOP is a pulling preddure exerted by protiens, mainly albumins. It pulls water towards it. If it was greater in plasma than tissue perfudion wouldn't have occured in the first place.
2) Fluid moves into tissues due to difference in pressures. The side having greater BCOP pulls the fluid. Diffusion can also be held accountable.
3) Net filteration occurs on the tissue side of capillaries since BCOP pushes the fluid towards tissues. This forms the basis for tissue perfusion.
4) Due to the occurrence of Tissue perfusion, the capillaries don't recover all the fluid that flows into tissues. Only partial recovery occurs. Partial fluid is diffused inside tissues and retained there.
5) This option is correct. Protiens being non diffusible, form the basis of BCOP. Here two concepts may be cleared- First that ions don't get involved in BCOP since they are diffusible. And second, even though the term BCOP infers Colloidal osmotic pressure, the dissolution of protiens in plasma is a true solution.
6) One of the factors for filteration is arterial pressure. The other being BCOP and the pressure of plasma in tissues.
The direction of net pressure determines filteration.

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