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BIO 669- Quiz 1 Questions & Answers 100% Correct!!
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How much of the body's water is intracellular? - ANSWER2/3 How much of the body's water is extracellular? - ANSWER1/3 Interstitial: 75% Intravascular: 25% Smaller amountsL sweat, urine, transcellular Populations susceptible to dehydration: - ANSWERPediatric and geriatric Net filtration ...

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  • August 27, 2024
  • 16
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • bio 669 stuvia 2024
  • bio 669 quiz 1 questions answers 100 correct
  • how much of the bodys water is intracellular a
  • how much of the bodys water is extracellular a

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BIO 669- Quiz 1 Questions &
Answers 100% Correct!!
How much of the body's water is intracellular? - ANSWER2/3



How much of the body's water is extracellular? - ANSWER1/3

Interstitial: 75%

Intravascular: 25%

Smaller amountsL sweat, urine, transcellular



Populations susceptible to dehydration: - ANSWERPediatric and geriatric



Net filtration - ANSWERforces favoring filtration minus forces opposing filtration



Aquaporins - ANSWERsmall pores in cells that allow for water transport across plasma membrane



Solute - ANSWERElectrolytes/proteins



Solvent - ANSWERWater/plasms



Osmolarity - ANSWERConcentration of osmotically active particles in solution

Osmolarity= # of particles (in solution) x concentration of particles



hyposmotic - ANSWERLower osmotic pressure



hyperosmotic - ANSWERhigher osmolarity



Osmosis - ANSWERMovement specifically of water in one direction or other based on high
concentration of H2O or low concentration of H20

,Isotonic - ANSWER2 solutions with the same osmotic pressure



Colloid osmotic pressure - ANSWERpressure created by protein in the blood



Reflection Coefficient - ANSWERaddresses 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 - ANSWERfacilitates the outward movement of water from the capillary
to the interstitial space

aka blood pressure

- A force that favors filtration



Interstitial oncotic pressure - ANSWERosmotically attracts water from the capillary into the interstitial
space

-Favors filtration



plasma oncotic pressure - ANSWERosmotically attracts water from the interstitial space into the
capillary

-Water-pulling

Favors reabsorption



Interstitial hydrostatic pressure - ANSWERfacilitates the inward movement of water from the
interstitial space into the capillary

Favors reabsorption



Filtration - ANSWERfluid movement out of the capillary and into the interstitial space



Reabsorption - ANSWERfluid movement into the capillary from the interstitial space



Edema - ANSWERAccumulation of fluid within the interstitial spaces

, Papilledema - ANSWERswelling of the optic nerve where it enters the retina



Baroreceptors - ANSWERstretch receptors measure pressure placed on vessel walls



What part of the brain stimulates thirst - ANSWERhypothalamus



What part of the brain secretes ADH - ANSWERposterior pituitary



Normal chloride level - ANSWER96-109



Normal Mag level - ANSWER1.4-2.1



Normal phos level - ANSWER3-4.5



When is renin released? - ANSWERIn response to decreased volume



What does aldosterone do? - ANSWERIncreases reaABSORPTION of sodium and increases secretion
of potassium



Natriuretic peptide - ANSWERCauses sodium and water excretion

Sounds like diuretic



What are the signs and symptoms of hypernatremia? - ANSWERWater 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)

Increased sodium=Increased excitability



What is the most life-threatening manifestation of hyponatremia? - ANSWERCerebral edema:
lethargy, confusion, decreased reflexes, seizures and coma

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