Glucose Concentration Conversion
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- In the last video we saw how blood sugar concentration, or,
- glucose concentration in your blood of 80mg/dL
- was kind of a normal fasting blood glucose, if you hadn't eaten for eight hours --
- or "before a meal," and the fancy word we learned in the last video was 'preprendial.'
- What I want to do in this video
- --because 80mg/dL really does not make a lot of tangible sense to me,
- I do not know exactly how much sugar that is--
- what I want to do is try to put this into different units
- so that we can better conceptualize how much sugar that might be in our bodies.
- So let us just do a little bit of unit analysis over here.
- So if we have 80mg/dL--
- --that's what we're talking about; that's a normal, fasting blood glucose level--
- now let us think about how much that is per liter.
- A deciliter is a tenth of a liter.
- So if we want to cancel out the units, we want dL in the numerator
- so we want to know dL per L, so that "that" and "that" will cancel out.
- There are 10 dL's per L.
- And so that gives us 80*10 is 800mg per--
- --dL's cancel out--
- 800mg per L. Now if we want that in terms of grams,
- we can just multiple to get rid of that 'mg,' so we put in the denominator,
- and put 'g' in the numerator. 1g is 1000mg.
- So, once again, milligrams cancel out, and you have 800/1000.
- So, 800/1000 is 0.8g/L.
- And then to make sense to normal human bodies--I looked this up on the internet--
- the average human body, I'm assuming--I'm like, 5'9", 150lbs, so I think I'm pretty close to average--
- but they said that the average human body has about 5L of blood.
- So let us multiple this...0.8g/L * 5L/average human
- Obviously a smaller human will have less, and a larger human will have more blood flowing through them...
- But this is an average person right over here, so the Liters cancel out,
- and so we get 0.8 * 5 = 4, and then we have grams per average human.
- And just to get an idea of what 4g are:
- 1 teaspoon is equal to 4.2g. So 4g is almost a teaspoon.
- So, 4g is approximately 1 teaspoon of glucose per human being.
- So in your entire bloodstream you have about a teaspoon of sugar that your cells can do whatever your
- cells need to do.
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