Excretion in humans Flashcards
Where is urea formed?
Urea is formed in the liver
What is urea made of?
Excess amino acids
Which organ excretes carbon dioxide?
The lungs
State 3 things the kidney excretes
- Urea
- Excess water
- Excess salts
State 3 conditions which alter the volume of urine produced
- Temperature
- water intake
- exercise
Describe the role of the liver in dealing with excess amino acids
The excess amino acids are converted into different proteins and used in the body or stored
What is deamination?
The removal of amine group in an amino acid to create urea
Why is excretion necessary?
To remove toxic substances like urea and carbon dioxide
Why is excretion necessary?
To remove toxic substances like urea and carbon dioxide
What is the function of the glomerulus in the kidney?
To filter out small molecules from the blood (e.g. water, glucose, urea and salts)
What is the function of the glomerulus in the kidney?
To filter out small molecules from the blood (e.g. water, glucose, urea and salts)
What is the function of a kidney tubule?
Reabsorbing molecules necessary to the body
What molecules does the kidney tubule reabsorb?
- All glucose
- Most of the water
- Some of the salts
What does kidney dialysis do?
- Removes the urea from the blood
- Maintains the glocose and salt balance
What happens during kidney dialysis
The blood is removed from a vein and passed through a dialysis machine along a membrane separating it from dialysis fluid, allowing waste to flow out
