Question

Which one of the following in real sense is not an excretory activity ?

• A. Giving out carbon dioxide
• B. Passing out faecal matter
• C. Sweating
• D. Removal of urea

Answer 1

The correct option is C

Sweating

The correct answer is option C.

Explanation for the correct answer

1. Excretion is the process of removal of unwanted chemical waste from the body.
2. It plays an important role in maintaining the homeostatic condition of the body.
3. Sweat is secreted through sweat glands.
4. Sweating helps in maintaining a cool, consistent temperature.

Explanation for the incorrect answer:

Option A: Carbon dioxide is exhaled out during respiration.

Option B: During egestion, fecal matter i.e. undigested food particles are excreted out through the anus.

Option D: The kidneys remove urea from the blood through tiny filtering units called Nephrons.

Final answer: Sweating is not an excretory activity in the real sense.