EXCRETORY SYSTEM
EXCRETORY SYSTEM ALL QUESTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In humans, which substances are normally filtered out of the blood by the nephrons and then excreted?
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water, carbon dioxide, and glucose
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urea, water, and mineral salts
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water, glycogen, and urea
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glucose, water, and red blood cells
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Explanation:
Detailed explanation-1: -The kidneys remove waste products called urea from the blood through tiny filtering units called nephrons.
Detailed explanation-2: -The nephrons of the kidneys process blood and create urine through a process of filtration, reabsorption, and secretion. Urine is about 95% water and 5% waste products. Nitrogenous wastes excreted in urine include urea, creatinine, ammonia, and uric acid.
Detailed explanation-3: -As blood passes through the nephron, fluid and waste products are filtered out. Much of the fluid is then returned to the blood, while the waste products are concentrated in any extra fluid as urine (wee). The urine flows through a tube called the ureter into the bladder.
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