excretion

Question 1

nephron processes

Answer 1

ultrafiltration in bowman’s capsule

selective reabsorption in proximal convoluted tubule

water reabsorption in loop of henle.

Question 2

orithine cycle

Answer 2

Deamination of excess amino acids -> NH3 + CO2 + orothine->an H2O is removed -> citruline ->(NH3 added and a H2O is removed) -> arginine -> (H2O is added and urea is removed) -> orithine