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BIO 669- EXAM QUESTIONS AND ANSWERS
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BIO 669- EXAM QUESTIONS AND ANSWERS
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BIO 669- QUIZ QUESTIONS ANDANSWERS
How much of the body's water is intracellular? - Answer-2/3
How much of the body's water is extracellular? - Answer-1/3
Interstitial: 75%
Intravascular: 25%
Smaller amountsL sweat, urine, transcellular
Populations susceptible to dehydration: - Answer-Pediatric and geriatric
Net filtration - Answer-forces favoring filtration minus forces opposing filtration
Aquaporins - Answer-small pores in cells that allow for water transport across plasma
membrane
Solute - Answer-Electrolytes/proteins
Solvent - Answer-Water/plasms
Osmolarity - Answer-Concentration of osmotically active particles in solution
Osmolarity= # of particles (in solution) x concentration of particles
hyposmotic - Answer-Lower osmotic pressure
hyperosmotic - Answer-higher osmolarity
Osmosis - Answer-Movement specifically of water in one direction or other based on
high concentration of H2O or low concentration of H20
Isotonic - Answer-2 solutions with the same osmotic pressure
Colloid osmotic pressure - Answer-pressure created by protein in the blood
Reflection Coefficient - Answer-addresses the ability of a membrane to be permeated
by a solute on a scale of 0 to 1
0=fully permeable
1=impermeable
capillary hydrostatic pressure - Answer-facilitates the outward movement of water from
the capillary to the interstitial space
aka blood pressure
- A force that favors filtration
, Interstitial oncotic pressure - Answer-osmotically attracts water from the capillary into
the interstitial space
-Favors filtration
plasma oncotic pressure - Answer-osmotically attracts water from the interstitial space
into the capillary
-Water-pulling
Favors reabsorption
Interstitial hydrostatic pressure - Answer-facilitates the inward movement of water from
the interstitial space into the capillary
Favors reabsorption
Filtration - Answer-fluid movement out of the capillary and into the interstitial space
Reabsorption - Answer-fluid movement into the capillary from the interstitial space
Edema - Answer-Accumulation of fluid within the interstitial spaces
Papilledema - Answer-swelling of the optic nerve where it enters the retina
Baroreceptors - Answer-stretch receptors measure pressure placed on vessel walls
What part of the brain stimulates thirst - Answer-hypothalamus
What part of the brain secretes ADH - Answer-posterior pituitary
Normal chloride level - Answer-96-109
Normal Mag level - Answer-1.4-2.1
Normal phos level - Answer-3-4.5
When is renin released? - Answer-In response to decreased volume
What does aldosterone do? - Answer-Increases reaABSORPTION of sodium and
increases secretion of potassium
Natriuretic peptide - Answer-Causes sodium and water excretion
Sounds like diuretic
What are the signs and symptoms of hypernatremia? - Answer-Water moves from ICF
to ECF=cells shrink
Thirst, weight gain, bounding pulse, Increased BP
Muscle twitching, hyperreactive reflexes
Confusion, coma, convulsions, cerebral hemorrhage (4 C'S)
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