Which of the Following Cannot Move Through the Capillary Walls

Question

Which of the following cannot move through the capillary walls and remain in the blood?
A) Glucose and dextrose
B) Insulin and glucagon
C) Thyroxin and calcitonin
D) Plasma proteins
E) Waste materials

Accepted Answer

Plasma proteins, such as albumin, globulins, and fibrinogen, are large molecules that cannot easily pass through the capillary walls due to their size. They remain in the bloodstream to maintain osmotic pressure and play roles in transport, immunity, and blood clotting.