Circulation of Fluid Between Plasma. Interstitium, and Lymph Flashcards
(26 cards)
extracellular fluid
33% of body fluids;
osmotic pressure.
synonyms for the osmotic pressure of plasma proteins; major importance because plasma COP is the sole force retaining water within the plasma compartment
glycocalyx network
small porous system that allows water and electrolytes to pass through the capillary membrane
True/False - Lymph has its own blood pressure system
False
True/False - Edema is an excess of interstitial fluid
True
True/False - In an acutely edematous limb, approximately 98% of the excess fluid is in the subcutis stretching the overlaying skin
True
Name THREE main functions of lymph
(double check)
1) Nutritional
2) Fluid regulation
3) defense
Compliance of tissue interstitium is defined by what TWO components
1) Change in volume
2) Change in interstitial pressure
What structure has the lowest compliance?
The brain
True/False - When injected into tissue, serum is readily absorbed into the blood stream.
False
True/False - Osmotic pressure is a pushing force.
False
The combination of water and electrolytes is an ultrafiltrate called what?
Interstitial fluid
What pressure mentioned in the principle of fluid exchange tends to suck fluid into the capillary?
Osmotic pressure
compliance
defined by the change in volume divided by the change in pressure.
Pitting edema test
0 mm = no edema 1 = mild 2mm 2 = moderate 4 mm 3 = moderately severe 6 mm 4 = severe 8 mm
human interstitial compartment contains how much fluid as a reservoir for plasma
10 - 12 liters
edematous tissue
excessive fluid is added to interstitium, dilution of glycosaminoglycan reduces swelling pressure to zero and eliminates normal compliance.
Most excess fluid in edematous limbs is in what layer
the subcutis layer (98% of the excess fluid)
Why does pitting edema occur
interstitial conductivity is high and fluid is rapidly displaced by the applied pressure
Formation and flow of Lymph
interstitial fluid –> lymph capillaries –> lymph vessels –> lymph trunks –> lymph ducts –> subclavian veins
The lymphatic system has THREE main functions
1) preservation of fluid balance
2) nutritional function
3) defense function
The lymph node is a mass of ___ and ____
lymphocytes and phagocytic cells
The ultimate lymphatic trunk is called the ______ and carries 3/4 of the total efferent lymph that drains into the ______
thoracic duct; subclavian vein
True/False - the brain has no lymphatic system, but has a specialized fluid drainage.
True