Module 5

Question 1

Adaptations of the Proximal convoluted tubule for selective reabsorption

Answer 1

1) Epithelial cells contain mitochondria to produce ATP
2) Epithelial cells contain microvilli - increase SA:V
3) Contain numerous and variety of cotransport proteins
4) Short diffusion pathway in one epithelial cell

Question 2

role of loop of henle

Answer 2

Ascending limb actively transports Na+ out into medulla - decrease water potential in medulla
Water moves down potential gradient from descending limb into medulla ( only descending limb permeable to water)