Fluid shift across the capillary wall : pulmonary and systemic oedema Flashcards Preview

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Flashcards in Fluid shift across the capillary wall : pulmonary and systemic oedema Deck (17)
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1

What fraction of body water us extracellular fluid?

1/3

2

How much of extra-cellular fluid is interstitial and what does interstitial mean?

75%
Bathing the body cells

3

What does interstitial fluid act as?

A go between for blood and body cells

4

The 4 components of the cardiovascular system?

Veins
Arteries
Capillaries
Arterioles

5

What do capillaries do?

-Allow rapid exchange of gases, water and solutes with interstitial fluid
-Deliver nutrients and O2 to body cells
-Remove metabolites from cells

6

How many layers of endothelial cells on a capillary?

Single layer

7

What does blood flow into the capillary depend on?

Contractile state of the arterioles

8

What do terminal arterioles do?

Regulate regional blood flow to the capillary bed in most tissues

9

What do precapillary sphincters do?

Regulate blood flow in few tissues

10

Why is blood flow through the capillary bed slow?

To allow adequate time for exchange

11

What do capillaries unite to form?

Venules

12

How are exchangeable proteins moved across capillary wall?

Vesicular transport

13

What generally can't cross capillary wall?

Plasma proteins and large molecules

14

What do lipid soluble substances go through in the capillary wall?

Endothelial cells of wall

15

What do water soluble substances go through in the capillary wall?

Water-filled pores

16

What is transcapillary fluid flow passively driven by?

Pressure gradients across capillary wall

17

What is transcapillary fluid flow?

It is ultra-filtration
Exchange across the capillary wall of essentially protein free plasma