Excretory Products And Their Elimination Question 38
Question: The diagram shows a simplified nephron. In which regions (marked as 1,2,3,4 and 5) would cells with many microvilli and mitochondria be found?
Options:
A) 1 and 5
B) 2 and 4
C) 2 and 3
D) 3 and 4
Show Answer
Answer:
Correct Answer: C
Solution:
[c] 1 - Bowman’s capsule: Mainly involved in ultrafiltration.
This is a passive process that does not require an energy source like the mitochondria.
2 - Proximal convoluted tubule: The large surface area (microvilli) and mitochondria are adaptations for selective reabsorption of substances from the glomerular filtrate.
3 - Descending limb of the loop of Henie: Creates and maintains an increasing osmotic gradient for sodium, chloride and urea.
4 - Distal convoluted tubule: Brush borders and mitochondria in this site for the fine control of salt, water and pH balance of blood.
5 - Collecting duct.
BETA
