Question

1. What kind of capillaries would be present in the liver to remove old, worn out and decrepit RBCs from circulation?

1. continuous capillaries
2. sinusoidal capillaries
3. fenestrated capillaries
4. myelinated capillaries

2. Which of the following is the greatest counteractive force to filtration at the arteriole end of the capillary?

1. IF oncotic pressure
2. capillary oncotic pressure
3. IF hydrostatic pressure
4. capillary hydrostatic pressure

Answer 1

1) The capillaries that found in the liver that helps in removing old, worn out and decrepit RBCs from circulation are sinusoidal capillaries.

Normally sinusoidal capillaries can be continuous, discontinuous or fenestrated.

But in liver it is discontinuous endothelium and similar to fenestrated. It is characterized by a wide diameter, porous and have scavenging function. It is called as liver sinusoidal endothelial cells (LSEC). They are specialized endothelial cells.

2)The greatest counteractive force to filtration at the arteriole end of the capillary is the capillary hydrostatic pressure. It is the driving force which helps to drive fluid out of the capillary. Thereby enables filtration. It is the greatest force at the arteriole end of the capillary and lowest force seen at the venular end.