HNF 150: Water
Severe dehydration symptoms:
pale skin, confusion, bluish lips and fingertips, weak rapid irregular pulse, shallow breathing, shock, seizure, coma, death.
Sources of water input:
foods, liquids, water created by metabolism.
Which part of the brain regulates water intake?
hypothalamus.
Which is NOT a sign of dehydration?
increased urination.
Safety regulations for bottled water:
1/week testing for bacteria and 1/year testing for chemicals.
Solvent:
a substance that dissolves another and holds it in a solution.
Diuretic:
compound, usually a medication, causing increased urinary water excretion.
Electrolytes:
compounds that partly dissociate in water to form ions, such as potassium ion.
Hard water:
contains dissolved minerals like calcium and magnesium.
Mild dehydration symptoms:
dry mouth, lack of energy, reduced urine, sudden weight loss, low BP, rough dry skin, impaired kidney function.
Ions:
electrically charged particles such as sodium or chloride.
Sources of water output:
kidneys, skin, lungs, feces.
Dehydration:
loss of water, symptoms progress rapidly from thirst to weakness to exhaustion, delirium and even death.
Major roles of water:
lubricant, chemical reactions, solvent, shock absorber, regulates body temperature, carries nutrients throughout the body, cleanses tissue and blood of wastes.
____ is generated in the tissues during the chemical breakdown of nutrients.
metabolic water.
Causes of dehydration:
not enough fluids, diuretics, excessive salt and sugar intake.
Example of soft water:
rainwater.
Safety regulations of tap water:
requires disinfection, Ecoli banned, hundreds of bacteria testing each month, filtering for pathogens and testing for chemicals 1/quarter.
Soft water contains more of which mineral?
sodium.
Which type of water is more highly regulated?
tap water.
Water balance:
the balance between water intake and water excretion, which keeps the body's water content constant.
What is usually the first sign of dehydration?
thirst.
Soft water:
treated water with only sodium ion.
