Question:
which is an example of excretion?
a) release of sweat from the sweat glands
b) removal of carbondioxide from the lungs
Please tell me what is the answer. I thought both urea(from the sweat) and CO2 are products of excretion? In fact, my textbook says that "carbon dioxide is an excretory product that is excreted by the lungs as gas in expired air". It also says that "excess mineral salts and nitrogenous waste products such as urea are excreted by the skin as constituents of sweat". So how am i supposed to do that multiple choice question??? Please help!
out of these two choices (b)is the better answer.This is so because main aim for the release of sweat is to cool the body by the production of water on skin.Sweat is not released when body is cool and it has waste to excrete.But in case of lungs, it is the only source by which body can excrete co2.
In this multiple choice question, both options a) and b) are examples of excretion. Excretion is the process of removing waste products from the body.
Option a) "release of sweat from the sweat glands" is an example of excretion because sweat consists of water, salts, and nitrogenous waste products such as urea. When you sweat, these waste products are being eliminated from your body.
Option b) "removal of carbon dioxide from the lungs" is also an example of excretion. Carbon dioxide is a waste product produced by cells during cellular respiration. It is transported to the lungs and excreted by exhaling it out as a gas.
So, in this case, both options are correct, and the answer to the question would be both a) and b). It's important to carefully read the question and consider all possible answers. If the question specifically asked for a single example of excretion, then you would need to choose between the two options. But since it asks for an example, both options are valid.