BIO 669- Quiz 1 Question And Answer With 100%
Correct Answers (GRADED A+) Latest Update
2024/2025.
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
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
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