Plasma proteins determine
A)plasma oncotic (osmotic) pressure.
B)capillary filtration pressure.
C)the rate of diffusion out of the capillary.
D)the size of the capillary pores.

Question

Quizplus · Accepted Answer

Plasma proteins, particularly albumin, contribute to the plasma oncotic (osmotic) pressure, which opposes the hydrostatic pressure in the capillaries and helps to keep fluid in the vascular compartment.

Answer: C 
 Plasma proteins do not directly affect the size of the capillary pores or the capillary filtration pressure. However, certain plasma proteins, such as albumin, are too large to pass through the capillary pores and contribute to a significant concentration gradient that can affect the rate of diffusion out of the capillary.

Plasma Proteins Determine