excretion Flashcards
1
Q
what is excretion?
A
a removal of metabolic waste from the body
2
Q
what is metabolic waste?
A
a substance that that is produced in excess by the metabolic processes in the cells; it may be toxic
3
Q
what are the excretory organs?
A
- the lungs
- the liver
- the kidneys
- the skin
4
Q
what are the two sources that the liver gets its bloody supply from?
A
- the hepatic artery
- the hepatic portal vein
5
Q
what are a few metabolic functions of the liver?
A
- control of blood glucose levels, amino acid levels, lipid levels
- synthesis of plasma proteins
- synthesis of red blood cells in a foetus
- detoxification of alcohol
- destruction of red blood cells
6
Q
what is a nephron?
A
the functional unit of the kidney
7
Q
what is ultrafiltration?
A
filtration of blood at a molecular level under pressure
8
Q
what is filtered out of the blood?
A
- water
- amino acids
- glucose
- urea
- inorganic mineral ions
9
Q
what are the treatments for kidney failure?
A
- Renal dialysis
- kidney transplant
