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1. What percentage of our body weight is body water? - Correct Answer:
60%
2. What are the functions of body fluid in the body? - Correct Answer:
lubricant
metabolism
transport
regulates body temperature
3. What are electrolytes and what does concentration depend on? -
Correct Answer: -Na+, Cl-, Mg+, Ca+, K+
- electrically charged when in solution
- influenced by fluid intake and output, acid base balance, hormones, cell
functions
- concentration depends on intake, absorption, distribution, and excretion
4. How is water distributed throughout the body? - Correct Answer: 1)
Intracellular:
Two-thirds of water in body
2)Extracellular:
Remaining third is divided into 2 compartments:
-Interstitial fluid (in between cells and organs)
, -Plasma
5. What electrolytes are highest in the intracellular fluid? Extracellular fluid? -
Correct Answer: ICF: high K+, Mg+, phosphate
ECF: high Na+, Cl-, bicarbonate ions
6. What is hydrostatic pressure? is it higher at arteriole or venous end of
capillary? when does hydrostatic pressure increase? - Correct Answer: -
water pushing pressure
-higher at arteriole end (pushing oxygen and nutrients out of capillary to go
to cells)
-increases due to venous obstruction or salt/water retention (due to
CHF/kidney failure), edema occurs
7. What is osmotic pressure? is it higher at arteriole or venous end of
capillary? - Correct Answer: -water pulling pressure
-high at venous end (want to pull fluid back into capillary from cells to bring
back to heart, and get rid of waste products)
8. What is osmolality? what is the electrolyte involved? - Correct Answer:
solute concentration in blood, how much stuff is in fluid
-sodium is main thing influencing osmolarity in blood, highest concentration
-water follows sodium
9. What is osmosis? - Correct Answer: water moving across a semi
permeability membrane
moves from low to high concentration
,10.What is colloidal osmotic pressure? what is main thing that influences? -
Correct Answer: 'oncotic pressure"
-pressure from stuff in blood
-increased pressure when increase particles (want to pull fluid in
-albumin is main influence
-increase albumin, increase COP, water follows protein
11.What is diffusion? - Correct Answer: movement of particles down a
concentration gradient, high to low
12.What is active transport? - Correct Answer: movement of particles
against concentration gradient, requires energy
13.What is third spacing? how can it happen? what can it cause? - Correct
Answer: -fluid moves where it is not supposed to be
-cannot be used for anything
-occurs in abdomen (ascites), liver disease, pancreatitis
-area rich in proteins (keeps pulling fluid in)
-have to drain
causes: slow diffusion, compression of blood vessels, slow healing,
increased risk of infection, pressure ulcers
14.What is thirst triggered by? - Correct Answer: -triggered by osmolality of
ECF
high osmolality: concentrated
low osmolality: diluted
-decreased circulating blood volume (low BP)
, -dry mucous membranes
15.What is capillary hydrostatic pressure? is it increased at the venous or
arteriole end? - Correct Answer: outward force, pushes fluid out of
capillary
increased at arteriole end
16.What is colloid osmotic pressure? is it higher at the arteriole or venous
end? - Correct Answer: draws fluid back into capillaries
increased at venous end
17.What is interstitial fluid hydrostatic pressure? is it higher at the arteriole or
venous end? - Correct Answer: draws fluid out of interstitial back into
capillaries
increased at venous end
18.What is interstitial fluid osmotic pressure? is it higher at the arteriole or
venous end? - Correct Answer: draws fluid into interstitial out of
capillaries
increased at arteriole
19.What is edema? what are causes of edema? - Correct Answer: -
excessive fluid in interstitial fluid
-increased arteriole/venous pressure
-increased vascular volume
causes: increased CHP (increased flow in), increased IOP (pull fluid into
tissues), blockage of lymph drainage (can't pull up extra fluid), decreased
COP (plasma proteins decreased)