Acids

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Tums and Such

Sweat

While I was working out yesterday I noticed that the sweat would gather itself into drops and fall off of my body once they got to heavy.  I had always wondered why it didn't just slide down my body without forming into drops.  I thought about it for a while using what I have learned and I think that I have found the answer to my question.  The way sweat works is really quite amazing to me.  The water it self is like an insulator that takes away heat and keeps me cool once I have gotten to hot.  It does this using its specific heat quality.  This wouldn't work if the water just slid off your body like gravity wanted it to.  The water molecules us cohesion to stick together and make a layer on your body and it uses adhesion to stick to the body.  Because of these qualities water is perfect for controlling body heat.  Staying cool lets your body work longer and for that we thank sweat and the properties of water.  I used to get mad that I would sweat so much but now that I know what it does I'm glad it does it.

water and the cool stuff it does

When I first learned that we were going to be learning about water I wondered why water it doesn't matter in biology?  Then the second question that came to my head was how does it stick together the way it does?  The lab we did just added to that interest.  I couldn't wait to figure out how it worked.  Then after I watched the video I understood how it worked.  The force that holds the water together is cohesion.  Then I thought, how does it stick to the string.  The answer to that was that was adhesion, that's when the water molecules are attracted to molecules in other things like the vein of a tree.  As I watched these videos I learned many different things that interested me.  The thing that stuck out to me the most was how the water stores energy from the sun that it catches in the day and makes the air cooler.  Then releases it into the air in the night to make the air warmer, making it a good temperature for us all day long.  Another thing that interested me was surface tension.  By definition it is the energy needed to increase the surface area of a liquid by a given amount.  This is the force on the top of water that lets things stay on top of it.  I wonder if this is how boats stay on top of the water?  On top of this stuff I also learned other things about water.  Most of these things I already knew from chemistry but it was a review of them.  I won't bore you with the definitions of them but the other items were hydrogen bond, hydrophilic, hydrophobic, polar covalent bond, and solvent.  These things deal a lot with the physical and chemical properties of water and makes water what it is.  For example the way that water bonds makes it have surface tension.  From this lesson I have learned that water is a very unique molecule and without it life would not exist and that is why it is important to biology.

story about double placebo

Once upon a time there was like 25 people in a room.  These people were brave and ready to face the upmost task a head of them.  It wasn't exactly deadly or anything it was a double-blind experiment.  Half of the pill bottles were filled with the actually pill and the others were filled with sugar pills which are called placebos.  Double-blind means that the patients and the doctor didn't know who got what pills.  So all of the people gathered nervously into the room not know what pill they would get.  They then got their bottles of pills and were told to come back a week later to see if the pill had done anything to them.  When they got back from the week of service there was drastic changes one 13 of the 25 people.  This was an easy double-blind experiment to test because no one knew what was going to happen.  It turned out that the pill was supposed to make all of your hair fall out and it worked perfectly 12 people came back bald and there was 12 sets of pills sent out the funny thing was the one guy decided to shave his head bald.  So that threw the doctor off for a while, he thought the sugar made everyone balled but the guy soon spoke up and the double-blind experiment was a success.