Science questions!

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I'm not talking about veins appearing blue beneath the skin, I mean that blood is sometimes more purple than red. Not blue, purple. Kind of a dark burgundy.
 
Yahya Sulaiman said:
I'm not talking about veins appearing blue beneath the skin, I mean that blood is sometimes more purple than red. Not blue, purple. Kind of a dark burgundy.
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perhaps in some diseased state? normally i havent come across a dark burgundy blood.
 
You are right gohar98. And the answer to the question [Where do fish go in winter?] is:
In winter only the top part of water is turned into ice. Fish are safe under the sheet of ice in liquid water.
 
Amoeba said:
How exactly is muscle built up through muscle-building exercises and routines?
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we have to keep in mind that muscle cells do not divide (hyperplasia) such that one cell divides into two cells. So the only way for muscles to "grow" is by increasing the size of the already existing individual cells. This is called hypertrophy.

in addition, we have some muscle stem cells (myoblasts) which then transform into muscle cells when the muscle is stimulated by work out in the gym. So new cells are indeed created, but by previous muscle stem cells. But musch growth in this way is very little compared to hypertrophy that I mentioned above. There is no mitosis in muscle.

When we work out, we are putting stress on muscle. To meet the increased stress, the muscle cells starts creating new muscle proteins (myofibrils and sarcomeres) to meet the increasing stress. As a result, due to increased protein production, muscle size increases and we call it "muscle building."

This lack of cell division in muscles is one reason why heart attacks (myocardial infarctions) cannot be reversed. if heart muscle has died, it will never grow back or be replaced by new muscle on its own.
 
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The way they explained it to me in 7th grade health class is that muscles get damaged on a microscopic level whenever they contract, and the more they're used the more the rips occur. The body overcompensates when it heals them, putting more muscle tissue there than there was before. (When we say that we've ripped or pulled a muscle we mean that it's happened on enough of a macroscopic level to be harder to heal and more debilitating.)
 
Although I am not a science/medicine/biology student, I am proud of my contribution to this thread. :D
 
I asked this same question to a doctor on another forum but he couldn't answer it due to the reference point not being practiced in his own country. In America bottles of Tylenol and what not always have this little gray plastic tube inside them, a cylinder maybe at the bottom of the bottle, and the only purpose I know of that it serves is to fake you out into thinking there's one more pill left when there isn't. What is the tube for?
 
Yahya Sulaiman said:
I asked this same question to a doctor on another forum but he couldn't answer it due to the reference point not being practiced in his own country. In America bottles of Tylenol and what not always have this little gray plastic tube inside them, a cylinder maybe at the bottom of the bottle, and the only purpose I know of that it serves is to fake you out into thinking there's one more pill left when there isn't. What is the tube for?
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maybe it functions like that of silica gels to absorp moisture?
to prevent the pills from sticking to each others?
 
diffraction of sunlight through the spherical water vapors stuck in the air causes dispersion and diffraction of light into its constituent colors VIBGYOR
 

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