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Friday, April 20, 2007

Did You Know?

Did You Know: It never fails! You hop in the pool, hot tub or even a nice bubble bath (lavender is my favorite) and sure enough within minutes you need to 'Pee'. Why is that? Well the culprit behind this nuisance is the pressure exerted by the water on your carotid arteries.

Your 2 carotid arteries are found in your neck and work to get blood up to your brain. When they sense pressure, the arteries trigger your heart to produce Atrial Natriuretic Peptide (ANP) which causes you to pee. Concurrently, other hormones that cause you to retain water are being down regulated such as Antidiuretic Hormone (ADH) and Aldosterone. Ultimately, you get that urge to urinate.

The most likely reason we have this response is that the receptors in the carotids sense the pressure increase and think it is due to high blood pressure. One way your body deals with high blood pressure is by ultimately decreasing overall blood volume by filtering some of the blood fluid into your pee. Hence we urinate!

My other alternative hypothesis for this adaptation is a purely primalistic/hunter-gatherer/ evolutionary response to being strangled. If someone has their hands around your neck (pressure on the carotids) then, naturally, your going to do whatever you can to get away. If that means peeing in their face, so be it. If that means wetting yourself, so be it. I can't think of a better, more honorable way to die than in a puddle of your own urine.

So now you know! Don't wear your tie to tight, don't swim in the baby pool and when someone has their hands around your neck then just unleash hell, fire and water and pray for the 'Piss Shiver'! That quick convulsion may be all you need to save your life!

1 comment:

Luke said...

I just think about water and I have to pee, I guess it is when I think about strangling, I am gonna grab my pee doll and head to the pisser