OCR A2 Biology: Excretion

What is excretion?

What is the function of the liver?

What does the hepatic artery do?

What does the hepatic vein do?

What does the hepatic portal vein do?

What does the bile duct do?

What is bile?

What is deamination?

What does deamination produce?

What happens to the organic acids?

Why does ammonia enter the ornithine cycle?

What in the ornithine cycle combines with ammonia?

What does this produce?

What happens to the Citrulline next?

What does ammonia and citrulline produce?

What combines with Arginine?

What does water and Arginine produce?

What is detoxification?

What is alcohol broken down into?

What can excess alcohol lead to?

What can excess paracetamol lead to?

What can excess insulin lead to?

What is ultrafiltration?

How does ultrafiltration work?

What three layers do filtered substances pass to enter the Bowman's capsule?

What is selective reabsorption?

What is selectively reabsorbed in the PCT?

How do these get reabsorbed back into the blood?

Where is water reabsorbed?

What do the descending limb and ascending limb form?