HLTH 230 Lecture Notes - Lecture 6: Methyl Group, Pancreatic Cancer, Neural Tube Defect
1 Feb 2014
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Approximately 60% of an adult"s body weight is water. > generally percentage of water is lower in females, elderly, and obese people athletic/muscular people = lots of water. Roles of water in body fluids: carries waste products and nutrients, maintains structure of large molecules such as proteins and glycogen, participates in metabolic reactions. Water balance: water intake and excretion quickly adjusted to ensure composition of intracellular fluid and interstitial fluid is maintained intracellular fluid (fluid within the cells) Usually high in potassium and phosphate interstitial fluid (between the cells) Water intake thirst: a conscious desire to drink: thirst lags behind the body"s need. If you feel thirsty, you are already dehydrated: influences water intake in response to changes sensed by mouth, hypothalamus, and nerves, hypothalamus initiates drinking when: Mouth becomes dry: excessive water intake stopped by: (signal you to stop drinking)
