Tissue Fluid Flashcards
1
Q
what is Tissue fluid?
A
- The liquid that surrounds the cells in a capillary bed
- It is the medium through which oxygen and carbon dioxide are exchanged between the blood and respiring cells
2
Q
where is Tissue fluid formed?
A
It is formed at the arterial end of the capillary beds and reabsorbed at the venous end
3
Q
How is hydro static pressure created?
A
- Is the pressure exerted by the blood pushing against the vessel wall.
- Created by the contraction of the muscular walls of the ventricles during ventricular systole.
- Measured in millimetres of mercury
4
Q
How is oncotic pressure created?
A
- Blood Contains large amounts of dissolved proteins called plasma proteins
- Main type of abulmins
- function is to create oncotic pressure
- Oncotic pressure is the pressure of proteins pulling water towards them
5
Q
How is Tissue Fluid is formed?
A
- Hydrostatic pressure is higher in the blood than in the tissue fluid
- water and small molecules are forced out e..g oxygen, sodium, glucose
- large molecules stay inside the capillary e.g. proteins
- pressure drops as you move along the capillary bed because water moves out.
6
Q
How is Tissue Fluid is returned?
A
- Water potential in the blood becomes lower than the water potential in the Tissue Fluid
- Becuase the proteins remain in the blood
- Water moves into the capillary by osmosis
- Hydrostatic Pressure drops in capillary
- water moves in down pressure gradient
- Tissue Fluid drains into the lymph