25. The Urinary System

What part of a nephron is responsible for reabsorbing all the nutrients and most of the water?

Which portion of the nephron empties into the collecting duct?

What happens when the concentration of Na+ decreases in the ascending limb of the nephron?

Which structure of the nephron is primarily responsible for filtering blood?

What does the countercurrent mechanism accomplish in the nephron loop?

The collecting duct receives fluid from which of the following structures in the nephron?

Which of the following statements is NOT correct regarding nephrons?

Aquaporins allow which substance to pass through the descending limb of the loop of Henle?

Which substance is secreted by the nephrons during urine formation?

Which structures together form the filtration membrane in the nephron?

Which of the following is the correct order of components of a nephron?

Which of the following lists the correct order of components of a nephron, starting from the site where filtration first occurs?

Urine drains from the nephron into the calyces through which of the following structures?

Which segment of the nephron loop is permeable to water?

How many nephrons does each kidney typically contain?