Question

Which of the following is an example of excretion?

(a). release of insulin from the pancreas.

(b). release of saliva from salivary glands.

(c). removal of carbon dioxide from the lungs.

(d). removal of facces from alimentary canal​

Answer 1

Answer:

(c) Removal of carbon dioxide from the lungs

Explanation:

These are known as metabolism. These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid... This process of removal of metabolic waste from the body is known as excretion. Green plants produce carbon dioxide and water as respiratory products.

Therefore answer is Option (c) Removal of Carbon Dioxide from the lungs.

Answer 2

The correct answer will be c). The removal of carbon dioxide from the lungs is an example of excretion.

The carbon dioxide along with other nitrogenous wastes formed due to metabolic activities are considered harmful to the body and therefore need to be excreted.

Other options:

• a). The release of insulin from the pancreas does not get excreted out of the body. Therefore it is not an example of excretion.
• b). The release of saliva from the salivary glands is not considered a harmful waste of the body that needs to be excreted out of the body.
• d). The feces formed in the body are generated from undigested food. Since they are not products of metabolic activities, this process cannot be termed excretion.

Hence, the appropriate option that acts as an example of excretion is c). Removal of carbon dioxide from the lungs.

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