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Jul
25
comment Do the enzymes and compounds in saliva help with stain removal?
Amylase doesn't break down proteins. It breaks down amylopectin -- a type of starch (sugar) molecule. Proteins are broken down by proteases (not found in saliva or semen), and many available stain removers use proteases.
Jul
23
awarded  Nice Answer
Jul
23
answered Why do tomatoes look so much like pomegranates?
Jul
17
answered Why doesn't Manipulated Virus for Cancer Cure Work
Jul
13
awarded  Enlightened
Jul
13
awarded  Nice Answer
Jul
12
answered Could viruses be used as antibiotics?
Jul
10
comment An obscure reference to a “golden vein”
At least one other person agrees with you: books.google.com/…
Jul
7
comment Is the immune system suppressed during sleep?
I don't have the time for a full answer, so I may come back, but generally 'no'. There is a difference between hibernation (a reduction in metabolic rate to survive prolonged periods of fasting) and sleeping. Humans do not hibernate, and when we are asleep the body doesn't try to save energy. Our brains go through REM sleep, which is just as active as waking hours, our organs -- especially dermal and muscle tissues -- amp-up their repair mechanisms while sleeping. Given that prolonged poor and/or lack of sleep significantly lengthens illnesses, the immune system should be very active.
May
15
comment What are the effects of long-term liquid breathing?
@HDE226868 -- One thing that absolutely must be said that wasn't addressed is this: All of those human studies used external pumps to move the fluid. Mammalian diaphragms are not designed to move a liquid medium more than a handful of times. They will literally tear themselves to shreds very, very quickly.
May
13
comment What recovers normal polarisation after hyperpolarisation?
Can't give a full comment at the moment, but... Na+ and K+ have different electrochemical equilibriums, and in addition to the Sodium-Potassium Pump there are many porins that act as passive diffusion routes to re-establish the cell's preferred equilibrium.
Apr
30
answered Determining how much energy a plant takes in?
Apr
29
comment Do we have fundamental conflict in biology?
@Remi.b -- More cells = more cell divisions required in the first place. Whale cells are not orders of magnitude larger than humans, despite being orders of magnitude larger as an organism. Since the vast majority of cells have some turnover, having more could also mean a hire rate of division even if the time it takes is higher. Peto's paradox looks fine (to me), but it does point out that DNA mutations do not always result in cancer. An extra stop-check prior to cell division seems to have a tremendous effect on cancers if you look at Naked Mole Rats. ;-)
Apr
26
awarded  Enlightened
Apr
26
awarded  Nice Answer
Apr
19
comment Why did the Brain develop in the front in most organisms?
@aandreev -- They co-evolved. As brains became more complex and bigger, there needed to be a better place to store them. Thick bones aren't very spacious. Hollow bones aren't very protective. The compromise for organisms evolving a larger brain was the skull: A hollow, encapsulating bone that can also be very dense (especially among goats, bovines, etc.). It's also a design that means there's only one area to protect instead of every single thick bone in your body.
Apr
19
answered Why did the Brain develop in the front in most organisms?
Apr
4
revised Core Biological concepts explained to a Computer Scientist?
added 6 characters in body
Apr
4
comment Core Biological concepts explained to a Computer Scientist?
@poka.nandor Thanks. :-)
Apr
4
revised Core Biological concepts explained to a Computer Scientist?
added 2 characters in body