Osmoregulation and The Kidneys

Question 1

What is Osmoregulation?

Answer 1

Regulating water content.

Question 2

What happens during Filtration in the nephrons?

Answer 2

• The liquid part of the blood is forced out of the glomerulus and into the Bowman’s capsule at high pressure.
• Bigger molecules (e.g. proteins) and blood cells can’t pass through.

Question 3

What happens during the selective reabsorption in the nephrons?

Answer 3

• All glucose is selectively reabsorbed: it’s moved back into the blood against a concentration gradient.
• Sufficient ions are reabsorbed.
• Sufficient water is reabsorbed.

Question 4

What happens during the final stage of a nephron?

Answer 4

Reabsorption of water by osmosis.