How many loops of Henle do humans have in one kidney?

• 500,000

• 1 million

• 2 million

• 2.5 million

What ion has the loop of Henle as its major site of absorption?

• Calcium

• Magnesium

• Phosphorus

• Potassium

What part of the loop is permeable to water?

• Thick ascending limb

• thin ascending limb

• thin descending limb

Which tubular segment has the lowest osmolality?

• proximal tubule

• thin descending limb of the loop of Henle

• thin ascending limb of the loop of Henle

• Thick ascending limb of the loop of Henle

Urea is secreted in which tubular segment?

• proximal tubule

• thin loops of Henle

• Thick ascending limb of the loop of Henle

• cortical collecting duct