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Flashcards in Fluid shift across the capillary wall Deck (16)
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1

What makes up 75% of extracellular fluid?

Interstital fluid

2

What does interstitial fluid act as?

Go-between between blood and body cells

3

What regulates regional blood flow to the capillary bed in most tissues?

Terminal arterioles

4

what regulates blood flow to capillaries in few tissues?

pre-capillary sphincters

5

How does water soluble substances diffuse into capillaries?

Move via concentration gradient in pores of capillaries

6

How do lipid-soluble substances diffuse into capillaries?

Pass through endothelial cells

7

How do exchangeable proteins diffuse into capillary?

via vesicular transport

8

What can not pass through capillary walls?

Plasma proteins

9

What are the 2 main pressures In capillaries?

-hydrostatic
- colloid osmotic (oncotic)

10

What do plasma proteins do?

Drag fluid from interstitial into capillary

11

What do starling forces favour?

Filtration at arteriolar end and reabsorption at venular end

12

where is the fluid absorbed when not all fluid is absorbed at venues?

Lymphatic system and returned to circulation as lymph

13

What does lymphatic drainage prevent?

accumulation of interstitial fluid

14

what is oedema?

accumulation of fluid in interstitial space

15

What occurs do diffusion distance in pulmonary oedema?

Diffusion distance increase and gas exchange is compromised

16

What are the 4 causes of oedema?

1)raised capillary pressure-arteriolar dilatation
2)reduced plasma osmotic pressure
3)lymphatic insuffiency- lymph node damage
4)changes in capillary permeability- inflammation