Kidney Filtration and Reabsorption Quiz

What process accompanies filtration in the kidneys to retain essential substances?

• Secretion

• Excretion

• Reabsorption

• Dialysis

Which of the following is reabsorbed back into the blood during reabsorption?

• Only waste products

• Water, sodium, and glucose

• Only proteins

• Only oxygen

How much of the filtrate becomes urine on average?

• 10 to 12 litres

• 3.5 to 5 litres

• 0.94 to 1.8 litres

• Less than 100 ml

In which part of the nephron does most reabsorption occur?

• Loop of Henle

• Distal convoluted tubule

• Collecting duct

• Proximal convoluted tubule

Which substances are reabsorbed in the proximal convoluted tubule?

• Only amino acids

• All glucose, amino acids, most mineral salts

• Only mineral salts

• Only metabolic waste

What is the main role of reabsorption in the nephron?

• Removing excess proteins from the blood

• Reclaiming useful substances back into the blood

• Storing urine before excretion

• Filtering large molecules from blood

What happens to metabolic waste like urea and creatinine during reabsorption?

• They are fully reabsorbed

• They are actively transported into blood

• They remain in the nephron to be excreted

• They are converted into nutrients