Flashcards in Lecture 11 - Water and Electrolytes Deck (50)
Who has the most water in the body?
Where does most water reside in the body?
3/4 lean tissue
< 1/4 fat tissue
What groups have the smallest portion of water?
Why do females have less water than males?
Females have more fat around the hips and thighs. Fat carries less water. Males typically have less fat and more lean muscle which has higher water content
What are some of waters body functions?
-Carries nutrient and waste
-Maintains structures of large molecules
-Maintains blood volume
What is the difference between Extracellular fluid, intracellular fluid and interstitial fluid?
Extra: outs of the cell (including inter)
Inter: between cells
Intra: within cell
What is the AI for men and women for total water?
-both include food and liquids
What controls water intake?
-recognizes concentrated blood and signals thirst
-recognizes distention of stomach and decreases thirst
What is the first and second signs of dehydration?
2-Weaknes, exhaustion, delirium
What are the symptoms of water intoxication?
Confusion, convulsions, death
What is hyponatremia?
Low Na levels in the blood
What happens when cells are thirsty?
Water from the blood goes to the cells, concentrating the blood. This also constricts blood vessels everywhere, when this happens around the mouth no saliva is produced
Where do we lose water from and in what order in terms of L?
What is the amount of water we have to lose and why?
500ml has to be lost for waste excretion
What is insensible water loss?
Water we don't think of losing
-from skin and lungs
What is the difference between hard and soft water?
Hard --> Higher in Ca
Soft--> Higher in Na
What are some health effects of water?
Meet body fluid needs
Protect against urinary stones and constipation
What is the fluid balance of cells?
2/3 fluid inside the cell
How do you control the movement of water?
Cant control the movement of water but we use electrolytes to control the water movement
-electrolytes attract water
What are the 3 Kidney hormones?
What does ADH do?
Prevents you from losing water, stimulates kidneys reabsorption of water
What does renin do?
Tells kidneys to bring back Na into the body
What does angiotensin do?
Constricts blood vessels
What us used in the kidneys and GI to regulate electrolyte balance?
The Na/K pump
-3 Na out
-2 K in
What causes fluid and electrolyte imbalances?
-Prolonged vomiting or diarrhea
-Burns and traumatic wounds
How does water regulate the acid-base balance int he body?
Helps to maintain the # of H+ ions
-kidneys and lungs do this too
What is a normal pH range?
What common form of Na do we consume?
Sodium Chloride (NaCl)
-used to preserve and enhance taste. *but not always in the form of NaCla
Which is worse, Na or salt?
Salt is worse in terms of the side effects