NFS 043 Lecture Notes - Lecture 9: Water Intoxication, Water Balance, Nutrient
19 Oct 2017
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Major minerals - essential minerals needed in amounts greater than 100mg/day. Trace minerals - essential minerals needed in amounts less than 100mg/day. Dietary guidelines name 4 shortfall nutrients: potassium, calcium, magnesium, iron (for some) Dietary guidelines also named one mineral that is over consumed: sodium. 60% of the adult"s body is composed of water. Water"s role in the body: solvent, cleansing agent (urine), lubricant and cushion, coolant (sweat) Water balance: body will excrete less water if more water is needed, dehydration (can lead to overheating), water intoxication. Body"s water weight can differ by several pounds overnight- temporary. Water recommendations: based on activity and environmental conditions. dri: 13 cups fluid from beverages for men and 9 cups fluid from beverages for women. Electrolytes: compounds (often minerals) that partially dissociate in water to form ions. Cells want to equalize concentrations of ions inside and out. Water will flow in between inner and outer cell fluid to equalize ion concentrations.
