Function and Formation of TISSUE FLUID: A level Biology. How it is formed and reabsorbed

Question 1

What is tissue fluid?

Answer 1

= contains water glucose, amino acids, fatty acids, ions, oxygen which bathes in tissue

Question 2

How is tissue fluid formed at arteriole end?

Answer 2

= cappilaries have small gaps in the wall- 1 cell thick
= liquid (water) and small molecules can be forcedout
= as blood passes from the arterioles the small diameter causes a high hydrostatic pressire- ultrafiltration
= water and small molecules are forced out of the small gaps
= large molecules and some water remains behind and bathe into tissues

Question 3

What is forced out?

Answer 3

= water molecukes
= disoslved minerals and salts
= glucose
= small [rpteomss and amino acids
= fatty acids
= oxygen

Question 4

What remains in the cappilary?

Answer 4

= red blood cells
= platelets
= large proteins

Question 5

How is tissue fluid reabsorbed? at venule end?

Answer 5

= large molecules remain in the blood
= created a lower water potential as lots of water was forced out compared to tisse fluid
= water reenters tissue fluod by osmosis
=
= towatds venule end no water is being forced out as hydrostatic pressure is lowered due to loss of liquid but the water poetnail is low
=

Question 6

How is equalibrian reached?

Answer 6

= not all liquid will be reabsorbed by osmosis as equalibrian is reached
= rest of tissue fluid surrounding cells and tissues is reabsorbed into lymphatic system
= lymph vessels similar to veins with valvs and surrounf blood vessels, gets absorbed into lynphatic system and lymph brings back into the blood

Question 7

What are plasma proteins?

Answer 7

= hydrophilic
= lower water potential
=

Question 8

How is hydrosttaic pressure caused?

Answer 8

= beating of the heart
= contraction of ventricles