# excretion

posted by .

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!

• excretion -

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.

## Similar Questions

1. ### math

Two twin brothers each have two favorite sweat shirts that they wear every other day. One day, dad decides that all four sweat shirts need to be washed! He takes all four shirts and washes and dries each. After washing the shirts, …
2. ### science

what is a :sweat shop" and before u type ill tell u that it isnt a shop in which u by sweat frum
3. ### physics!

while running a marathon, alex is producing about 900 calories per hour. 1 calorie is 4184 j. if the specific heat of the human body is 3500 j/kg x c, how many degrees celsius would alexs temperature increase if he did not sweat and …
4. ### Chemistry

Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 155 cal/g. The scientist observing …
5. ### Chemistry 1

Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 215 cal/g. The scientist observing …
6. ### science

True or False: One of the skinâ€™s functions is to produce vitamin D (1 point) True False 2. Your _____ is the largest organ of your body. (1 point) brain large intestine skin lungs 3. The _____ is the outer, thinnest layer of your …
7. ### Science

You are exercising on a hot day. Your body temperature goes up. You begin to sweat. The sweat cools your body. Sweating is an example of: A. Input. B. Process. C. Output. D. Feedback.*** I think D?
8. ### english

How does the title sweat represent the tears Delia was crying from the abuse she received. in the book sweat by Zora Neale Hurston.
9. ### Science

You are exercising on a hot day. Your body temperature goes up. You begin to sweat. The sweat cools your body. Sweating is an example of: A. Input B. Process C. Output D. Feedback I'm not sure whether it is C or D...someone please …
10. ### Science help immediately

You are exercising on a hot day. Your body temperature goes up. You begin to sweat. The sweat cools your body. Sweating is an example of: A. Input. B. Process. C. Output. This D. Feedback. or this?

More Similar Questions