Tissue fluid

Question 1

what are lymph vessels?

Answer 1

series of tubes that collect substances and goes back to the heart, has a valve and is part of the lymphatic system.

Question 2

is hydrostatic or osmotic pressure greater at arteriole end-

Answer 2

hydrostatic .

Question 3

what substances are too large to pass out of capillaries-

Answer 3

RBCs and blood proteins e.g fibrinogen- these lower the water potential in cells.

Question 4

how is lymph formed

Answer 4

mot all substances return to blood directly, some is drained into a 2nd system called the lymphatic vessels. water and dissolved substances drain into these vessels forming lymph fluid. The largest vessel empties the lymph back into the blood stream close to the heart.

Question 5

tissue fluid to cells -

Answer 5

high metabolic rate in cells uses o2 and glucose creating a conc gradient between tissue fluid and cells.

Question 6

cells to tissue fluid.

Answer 6

co2 produced diffusing down a conc gradient into tissue fluid.

Question 7

what does a high BP do to tissue fluid.

Answer 7

hydrostatic pressure at arteriole end is higher than usual.
-more fluid forced out -“adema”-swelling.
-less fluid can enter blood due to high hydrostatic pressure at venous end.

Question 8

how is kwashiorkor caused

Answer 8

lack of blood protein-water pot not lowered and water collects in tissue fluid causing swelling.

Question 9

how is elephantitis caused

Answer 9

parasitic worm lodges into lymphatic system so lymph builds up.

Question 10

what is the role of the lymphatic system

Answer 10

prevents build up of excess tissue fluid as tissue fluid is exchanges back to the heart.