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Lecture 10

HLTB11H3 Lecture Notes - Lecture 10: Solution, Nutrient, Insulin Resistance

Health Studies
Course Code
Thomas M S Wolever

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Wednesday, March 20, 2019
Water and the Electrolytes
An essential nutrient required for survival
Water is a polar solvent:
-Solvent: a fluid in which one ore more substances dissolve
-Polar: molecule that has a positive charge at one end and a negative
charge at the other
The polarity of water comes from hydrogen and oxygen
Blood is 90% water
- Blood transports oxygen and nutrients to cells and removes carbon dioxide
and waste products
The body is about 60% water.
Water functions as a lubricant and cleanser:
-tears wash away dirt
-Synovial fluid lubricates joints
-Saliva assists in chewing, taking and swallowing
-spinal fluid protects against shock
Water helps regulate body temp. by slowly holding heat and changing temperature slowly
*** splitting apart amino acids (AA) for
disaccharides to polypeptides

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Wednesday, March 20, 2019
2/3 of body water is Intracellular fluid
Osmosis- cause fluid to move in & out of cells in
response to levels of concentration of dissolved
*NOTE:* the sugar added to the strawberry creates
an osmotic reaction where the water in the
strawberry is drawn out
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