water and electrolyte balance

Question 1

how much water is in our bodies?

Answer 1

40L

Question 2

how much water in our body is intracellular?

Answer 2

2/3

Question 3

how much water in our body is extracellular?

Answer 3

1/3

Question 4

what is the average intake/output of water in our body a day?

Answer 4

2,500mL

Question 5

what is thirst?

Answer 5

driven by increased blood osmolarity and reduced bp
(hypothalamus responds by producing ADH, reducing salivation, triggering thirst)

Question 6

what can trigger thirst?

Answer 6

1% water loss

Question 7

what triggers thirst inhibition?

Answer 7

drinking quickly

Question 8

what does is the outcome of ADH released due to thirst?

Answer 8

water retnetion

Question 9

what is most effective at controlling dehydration?

Answer 9

ADH (not aldosterone)

Question 10

what does na/k do in the body?

Answer 10

-regulates bp
-electrical conduction (ATP)
-gradient sets up 2nd active transport
-principal component of RMP
-na/k pump running(heart)

Question 11

what does cl- do in the body?

Answer 11

-chloride shift
-formation of hcl
-RMP

Question 12

what does ca++ do in the body?

Answer 12

-muscle contraction
-structural role
-blood clotting
-2nd messenger systems
-influx at synapse

Question 13

what do phosphate groups do in the body?

Answer 13

-ATP
-nucleic acids
-phospholipid bilayer