Question

Which of the following is completely reabsorbed in the kidneys?

• A. Glucose
• B. Uric acid
• C. Vitamins
• D. Water

Answer 1

The correct option is A

Glucose

The correct option is A:

Explanation of the correct option:

1. Kidneys are the vital organs located on either side of the body that look like beans and are responsible for the filtration of the blood.
2. Nephrons are the kidneys' functional unit, which looks like a tiny funnel attached to a long tube.
3. These funnel-shaped structures have tiny capillaries that filter the waste materials from the blood.
4. Glucose is a sugar molecule that is completely reabsorbed in the kidneys, it is not passed out through urine.

Explanation of the incorrect options:

Option (B):

1. Uric acid is a nitrogenous waste that is passed out through the urine.
2. The organisms whose urine consist of uric acid are known as uricotelic organism.
3. It is not reabsorbed.

Option (C):

1. Vitamins are the essential components for the proper functioning of the body.
2. They are reabsorbed by the kidneys. However, a little amount of vitamin is passed out together with the urine.

Option (D):

1. Water is reabsorbed by the nephrons.
2. However, complete reabsorption of water does not take place.

Final answer: Glucose is completely reabsorbed in the kidneys.