Fluid shift across the capillary wall : pulmonary and systemic oedema

Question 1

What fraction of body water us extracellular fluid?

Answer 1

1/3

Question 2

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

Answer 2

75%

Bathing the body cells

Question 3

What does interstitial fluid act as?

Answer 3

A go between for blood and body cells

Question 4

The 4 components of the cardiovascular system?

Answer 4

Veins
Arteries
Capillaries
Arterioles

Question 5

What do capillaries do?

Answer 5

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

Question 6

How many layers of endothelial cells on a capillary?

Answer 6

Single layer

Question 7

What does blood flow into the capillary depend on?

Answer 7

Contractile state of the arterioles

Question 8

What do terminal arterioles do?

Answer 8

Regulate regional blood flow to the capillary bed in most tissues

Question 9

What do precapillary sphincters do?

Answer 9

Regulate blood flow in few tissues

Question 10

Why is blood flow through the capillary bed slow?

Answer 10

To allow adequate time for exchange

Question 11

What do capillaries unite to form?

Answer 11

Venules

Question 12

How are exchangeable proteins moved across capillary wall?

Answer 12

Vesicular transport

Question 13

What generally can’t cross capillary wall?

Answer 13

Plasma proteins and large molecules

Question 14

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

Answer 14

Endothelial cells of wall

Question 15

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

Answer 15

Water-filled pores

Question 16

What is transcapillary fluid flow passively driven by?

Answer 16

Pressure gradients across capillary wall

Question 17

What is transcapillary fluid flow?

Answer 17

It is ultra-filtration

Exchange across the capillary wall of essentially protein free plasma