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HSC Biology Question Thread
Sine:
--- Quote from: Sssssrr on August 01, 2016, 10:29:42 pm ---could someone please explain to me the difference between enatiostasis and homeostasis?
thanks
--- End quote ---
enatiostasis is the the maintenance of metabolic and physiological functions in response to variations in the environment.
homestasis is the maintenance of relatively stable internal environment despite fluctuations of the external environment
Skidous:
To add onto what Sine said, you should also have an example of each.
Enantiostasis: Mangroves Trees active accumulated salt on older leaves in order to prevent the salt from building up in other cells, the salt is removed when the leaves fall off.
Homeostasis: Aldosterone is activated when the blood pressure and ion concentration in blood is too low in order to actively absorb more sodium ions and stabilise blood pressure
Sssssrr:
thanks that was really helpful!
studybuddy7777:
--- Quote from: Skidous on August 02, 2016, 06:49:11 am ---To add onto what Sine said, you should also have an example of each.
Enantiostasis: Mangroves Trees active accumulated salt on older leaves in order to prevent the salt from building up in other cells, the salt is removed when the leaves fall off.
Homeostasis: Aldosterone is activated when the blood pressure and ion concentration in blood is too low in order to actively absorb more sodium ions and stabilise blood pressure
--- End quote ---
We had this exact question ("Distinguish between homeostasis and enantiostasis") so i got full marks in the homeostasis part but when i talked about mangrove trees and the accumulation/excretion of salt for enantiostasis i ended up getting a cross right on "mangrove"l also said it was the maintenance of metabolic functions.
This was in my 1/2yearly btw. This question was out of 4. I got 2 for homeostasis and 1 for enantiostasis. What was i missing to make it a 4/4?
Skidous:
My guess is that you need 2 examples. These include the
Osmoregulators: organisms that avoid changes in their internal environment and have the ability to keep the solutes at an optimal level (‘regulate’ solute concentrations within the body), regardless of the differing external environment. i.e Mussels close their mouths in order to keep the salt levels in their tissues the same as sea water
Osmoconformers: organisms that tolerate the changes in the environment by altering the concentration of their internal solutes to match the external environment. i.e the fiddler crab accumulates salt into its tissues to match seawater and pumps out the excess when exposed to fresh water.
You should also talk what estuaries are and what change in the environment that requires enantiostasis to occur for these organisms to live in their ecosystems
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