Kidneys

What happens if blood is too dilute

Then water moves into cells by Osmosis

What happens if blood is too concentrated

Then water moves out of cells by osmosis

How does the body lose water

Our lungs when we exhale

When we sweat

Kidneys in urine

What does sweat contain

Sodium ions and Urea

Why can’t we control amount of sweat loss

As sweating is part of temperature control system

What happens if blood is too dilute what do kidneys do

Kidneys remove excess water and produce greater volume of urine

What is removed in urine

Urea,Excess ions and excess water

What happens if body loses or gains too much water

Osmosis can’t function properly

How does kidney filtration and selective reabsorption work.

-Urea is forced out of blood into kidney as well as glucose,amino acids,ions and water

-All glucose,some ions and some water is reabsorbed. Urea not absorbed but excreted in the urine

How does the Kidneys remove waste product urea and adjust Water and ions levels

1)Blood enters through artery and contains Urea which is removed by kidneys as well as excess water and ions

2)These leave the kidney in form as urine and stored in blodd

3)Blood now leaves kidney through vein and now blood has no urea

How does the Kidney adjust levels of molecules in blood

1)Blood passes though Capillaries where small molecules are filtered out of blood. Which includes urea,ions,water and glucose

2)Which pass though a tube.

3)All Glucose some ions and some water is re-absorbed back into blood

3)Urea,excess ions and excess water are released as urine

What is Selective reabsorption

When Kidney reabsorbs all glucose some water and some ions

How do we get amino acids into our blood

When we get a lot of protein in our diet and digest it

How do we get rid of excess amino acids

1)Liver breaks down the excess amino acids into fats and carbohydrates which can be stored and produces ammonia as waste product..

2)Ammonia is toxic so liver immediately converts it into urea

3)Urea is then safely excreted by kidneys in form of urine

What is deamination

When Liver breaks down excess amino acids into ammonia