The loop of henle B3

Question 1

What is the role of the loop of henle?

Answer 1

The role is to create a very high concentration of salts in the tissue fluids of the medulla, through which the collecting duct passes.

Question 2

What are the two regions of the loop of henle?

Answer 2

The ascending limb and descending limb, surrounded by blood capillaries. the top parts of both limbs are thicker than the bottom parts.

Question 3

What are the two regions permeable to?

Answer 3

-The descending limb is permeable to water (water moves out) but not Na+ and Cl- ions. THE LEFT ONE
-The ascending loop is permeable to Na+ and Cl- ions but not water. (Ions move out). THE RIGHT ONE

Question 4

List what happens in ascending limb

Answer 4

1- At top of ascending: Sodium and chlorine ions are actively pumped out (using active transport) into surrounding tissue fluid of medulla
2- Creates high solute conc in tissue fluid
3- As filtrate moves down the descending limb, water drawn out of filtrate by OSMOSIS
4- As filtrate descends it becomes more and more concentrated because water is leaving
5- Water is removed by capillaries around loop of henle
6- When it reaches the bend at bottom the conc of solutes in filtrate is very high
7- Na+ and Cl- leave filtrate by diffusion so conc of salt ions in tissue fluid of medulla ⬆️

Question 5

What does a thicker medulla mean?

Answer 5

A longer loop of henle and more concentrated urine