EXCRETORY SYSTEM
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The amount of water reabsorbed in the collecting ducts
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The amount of fluid filtered from the blood in the glomeruli
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The amount of solutes selectively reabsorbed in the proximal convoluted tubule
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The amount of blood flowing to the kidney
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Detailed explanation-1: -The kidney is the main organ responsible for osmoregulation in the human body. It filters blood to remove excess water and dissolved substances, such as salts and urea, and then reabsorbs the necessary substances back into the bloodstream, while excreting the excess in the form of urine.
Detailed explanation-2: -Biological systems constantly interact and exchange water and nutrients with the environment by way of consumption of food and water and through excretion in the form of sweat, urine, and feces.
Detailed explanation-3: -Here’s how kidneys perform their important work: Blood enters the kidneys through an artery from the heart. Blood is cleaned by passing through millions of tiny blood filters. Waste material passes through the ureter and is stored in the bladder as urine. Newly cleaned blood returns to the bloodstream by way of veins.
Detailed explanation-4: -Water reabsorption is by osmosis through water channels in the membrane. These water channels consist of a family of proteins called aquaporin. At least seven different aquaporin isoforms are expressed in the kidney.