Tissue Fluid

Question 1

What is tissue fluid

Answer 1

Fluid containing water, glucose, amino acids, fatty acids, ions and oxygen which bathes the tissue

Question 2

How is tissue fluid formed

Answer 2

• capillaries have small gaps in their walls so liquid and small molecule can be forced in
• as blood enters the capillaries from arterioles, the smaller diameter results in a high hydrostatic pressure so water, glucose, amino acids, fatty acids and ions and oxygen are forced out. This is known as ultrafiltration

Question 3

What is forced out

Answer 3

Water molecules
Dissolved minerals and salts
Glucose
Small proteins and amino acids
Fatty acids
Oxygen

Question 4

What remains in the capillary

Answer 4

Red blood cells
Platelets
Large proteins

Question 5

How is water reabsorbed in tissue fluid

Answer 5

Large molecules remain in the capillaries and therefore create a lowered water potential
Towards the venule and end of capillaries, the hydrostatic pressure is lowered due to the loss of liquid but the water potential is very low
Water renters the capillaries by osmosis