Tissue fluid

Question 1

What is tissue fluid?

Answer 1

The fluid that surrounds cells in tissues

Question 2

What makes up tissue fluid?

Answer 2

Made from small molecules that leave the blood plasma such as water and oxygen and nutrients and small proteins

Question 3

What is the function of tissue fluid?

Answer 3

Cells take in nutrients, oxygen and water from tissue fluid then releases metabolic waste back into it (eg CO2) for capillaries to take in

Question 4

Arteriole end of a capillary

Answer 4

Hydrostatic pressure in capillaries is greater than in tissue fluid so fluid is forced out the capillary
Small osmosis of water into capillary as water potential in fluid > water potential in capillary but the net movement of water is out of capillary

Question 5

What is the hydrostatic pressure in arteriole end caused by?

Answer 5

Ventricle contracting and sending blood from arteries to arterioles

Question 6

Smaller osmosis of water into capillary

Answer 6

Due to higher water potential in the tissue fluid than capillary thus osmosis from high water potential to low water potential

Question 7

Arteriole end net movement

Answer 7

Overall, water and nutrients and oxygen out of capillary into tissues

Question 8

What proteins remain in the Arteriole end of capillary?

Answer 8

Plasma and large proteins remain in capillaries

Question 9

Venule end of capillary

Answer 9

Net flow movement of water into capillary via osmosis
Smaller hydrostatic pressure outwards

Question 10

What is the osmotic movement of water into capillary at the Venule end caused by?

Answer 10

Lower water potential in capillary than in fluid due to a high conc of plasma proteins remaining in capillary
So osmosis of water into the capillary

Question 11

Smaller hydrostatic pressure at Venule end of capillary

Answer 11

Caused by lower hydrostatic pressure as the pressure begins to decrease thus small movement into capillary