Why is reabsorption necessary after filtration in a nephron?
Answer and explanation
Correct answer: Because useful substances and water are taken back into the body
During ultrafiltration in the nephron, water and small dissolved substances pass from blood into the filtrate. The filtrate may contain useful materials such as glucose, amino acids, suitable amounts of salts, and much water. Selective reabsorption returns these substances to nearby blood capillaries while wastes remain for urine formation. Thus option A is correct. The other choices wrongly call everything waste or assign filtration to the bladder.
Frequently asked questions
What is the correct answer to this question?
Because useful substances and water are taken back into the body
Why is this the correct answer?
During ultrafiltration in the nephron, water and small dissolved substances pass from blood into the filtrate. The filtrate may contain useful materials such as glucose, amino acids, suitable amounts of salts, and much water. Selective reabsorption returns these substances to nearby blood capillaries while wastes remain for urine formation. Thus option A is correct. The other choices wrongly call everything waste or assign filtration to the bladder.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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