Qualification > Sciences
Human BiOlogy.
Deadly_king:
--- Quote from: iluvme on October 20, 2010, 06:56:46 pm ---Thank You. :) Really helped. +rep
Anyways,
C02 reacts with lime water when blown through it to form a chalky suspension. Suggest how you could use this information to show that you produce more CO2 when you exercise than when you are at rest.
--- End quote ---
You're welcome ;)
Hmm........the concentration of the chalk suspension will reveal its amount.
Firstly, when you are at rest, expired air is blown into a boiling tube containing lime water for about 10s.
Now take another similar test-tube containing same amount of lime water. After having exercised, expired air is blown into the test-tube for the same lapse of time.
NOTE : Keeping all the above mentioned variables constant is very important so that the results of your experiment are affected only by concentration of carbon dioxide from expired air.
You will note that the suspension is thicker in the second test-tube. This will indicate that more carbon dioxide is present in expired air when you exercise than when at rest. ;)
iluvme:
Oh okay thanks.
I was thinking about the number of breaths and stuff. :)
Deadly_king:
--- Quote from: iluvme on October 22, 2010, 06:34:20 am ---Oh okay thanks.
I was thinking about the number of breaths and stuff. :)
--- End quote ---
Anytime :)
Yeah ......... you can take the number of breaths instead of 10 seconds. It would turn out to be the same ;)
The key part is to keep it constant for both experiment. So if you took 10 breaths for the first one, you should take 10 breaths for the second one as well :D
iluvme:
Righto, thanks.
Distinguish between the terms meiosis and mitosis.
For this Q, should we write about the number of daughter cells obtained, the chromosomes and stuff?
The Golden Girl =D:
http://www.differencebetween.net/science/difference-between-mitosis-and-meiosis/
http://www.answerbag.com/q_view/278075
I hope i helped :)
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version