Tissue fluid 2.0 / 5 based on 1 rating ? BiologyHuman, animal and plant physiologyASWJEC Created by: sophiee96Created on: 20-03-13 16:24 What two things does tissue fluid do? Bathes cells which make up tissues and acts as a medium through which substances may be exchanged with the blood 1 of 19 Name five things the tissue fluid supplies the cells with? Glucose, amino acids, fatty acids, salts and oxygen 2 of 19 What does tissue fluid have the same composition as? Blood 3 of 19 What does blood contain but tissue fluid lack? Plasma proteins 4 of 19 Why are there no plasma proteins in tissue fluid? Because their molecular size is too big to pass through capillary walls 5 of 19 Whatis tissue fluid formed from? Blood resistance in capillary beds 6 of 19 What are the two ends of the capillary bed called? Artery end and vein end 7 of 19 What sort of pressure is the blood under at the arteriole end of the capillary bed? High hydrostatic 8 of 19 Why is blood under high pressure at the arterial end of the capillary? Because of the pumping action of the heart and the resistance to blood flow of the capillaries 9 of 19 Whay is the effect of this high hydrostatic pressure? The fluid part of the blood is forced through the capillary walls and into the spaces between the cells 10 of 19 What effect does the presence of plasma proteins have on the water potential of blood? It reduces it 11 of 19 Why is there a net flow of water and solutes out of the blood at the arteriole end of the capillary? Because the hydrostatic pressure of the blood is greater than the osmotic forces 12 of 19 Why is there a diffusion gradient at the arterial end of the capillary bed for solutes such as glucose, oxygen and ions? Because these substances are being used up in cell metabolism 13 of 19 Which end of the capillary bed has the lower blood pressure? The venous end 14 of 19 What happens to water at the venous end of the capillary bed? It is reabsorbed from the tissue fluid and passes back into the capillaries by osmosis 15 of 19 What is the reduced water potential of the blood created by at the venous end of the capillary bed? The presence of plasma proteins caused Blythe net inflow of water 16 of 19 What happens to the amount of water being reabsorbed from the tissue fluid spaces if the diet is poor in protein? It is reduced 17 of 19 Why does the amount of water reabsorbed reduced when there are less plasma proteins? Becuase the water potential of the blood isn't as reduced 18 of 19 What is it called when plasma leaks out of capillarys? Tissue fluid 19 of 19
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