Unit4- 5.6~ Functions of kidney

Question 1

Whata re the functions of the kidney?

Answer 1

• Removal of urea
• Regulation of water levels
• Ultrafiltration
• Reabsorption
• Osmoregulation

Question 2

What is the occurs during the removal of urea?

Answer 2

• Liver creates substance, urea
• This passes through the blood into the kidney
• The kidney removes this urea from the blood and the body
• Parts of kedney nephron, glomerulus and Bownmans capsules, act as filter
• Blood comes under high pressure seperating the urea and unwanted protein and blood continues around body

Question 3

What is the occurs during ultrafiltration?

Answer 3

• Blood enters glomerulus at high pressure
• High pressure causses plasma forced out through capillary walls into bowmans capsule
• Due to speed its ultrfiltration
• This removes water, nutrient and water, leaving blood proteins and cells behind

Question 4

What is the occurs during reabsorption?

Answer 4

• Molecules and ions will be reabsorped into the circulatory system
• Fluid passes through components of nephron as water and ions are removed
• In collecting duct, secretion will occur, before fluid leaves ureter

Question 5

What is the occurs during osmoregulation?

Answer 5

• Controls water leves and minerall ions in blood
• Water levels & mineral ions in the blood are controlled to keep concentrations the same inside he cells around them
• This protects cells by stopping too much water frmo entering/leaving them by osmosis

Question 6

What is the occurs during regulations of water levels?

Answer 6

• Blood transported to kidney through renal artery, blood is filtred at high pressure, kidney selectively reabsorbs useful materials. After purified blood returns to circulatory system
• Kindey produces urine, this maintains water balance.