NUR206 Fluids & Electrolytes
Study online at https://quizlet.com/_i1hled
1. Body water over lifespan: Decreases
we become raisins!
2. 2 fluid compartments: Intracellular
Extracellular
3. fluid compartment: intracelullar: Within the cell
•2/3 of body's fluid is within the cell
4. Fluid compartment: extracellular: Interstitial
Intravascular (plasma)
Transcellular
examples:
•CSF
•Digestive juices
•Mucus
5. Calculation of Fluid Gain or Loss: •One liter of water weighs 2.2 lb (1 kg)
•Body weight change is a great indicator of overall fluid volume loss or gain
6. What is the most accurate way to determine fluid gain or loss: Weighing Is the most
accurate way.
7. Electrolytes and the two types of ions: •Substances whose molecules dissociate into ions when
placed in water
-Cations: positively charged
-Anions: negatively charged
An Equivalent is an expression of the chemical combining power of an electrolyte in a fluid
8. Electrolytes concentration is expressed in...: mEq/L
9. Mechanisms controlling Fluid and Electrolyte Movement: Diffusion
Osmosis
10. Diffusion: Movement of molecules from high to low concentration
11. Osmosis: Movement of water across a membrane from LOW solute concentration to HIGH
, NUR206 Fluids & Electrolytes
Study online at https://quizlet.com/_i1hled
12. Osmotic pressure: Amount of pressure required to prevent the inward flow of water across a semiperme-
able membrane
13. Osmolarity measures the: total milliosmoles/L of solution(mOsm)
14. Osmolality measures the: number of milliosmoles/kg of water
15. Osmotic Pressure Effects on Red Blood Cells: Hypertonic
Isotonic
Hypotonic
16. Osmolarity vs tonicity: are related but distinct concepts. ... The terms are different because osmolarity
takes into account the total concentration of penetrating solutes and non-penetrating solutes, whereas tonicity takes
into account the total concentration of only non-penetrating solutes.
17. Isotonic RBC: In an isotonic environment, the relative concentrations of solute and water are equal on both
sides of the membrane.
Red blood cell normal
18. Hypotonic RBC: red blood cell will bloat up and may explode,
19. Hypertonic RBC: water will leave the cell, and the cell will shrink
20. Measurement of Plasma Osmolality: Calculate the plasma osmolality using the following formu-
la
Plasma Osmolality = (2 x Na) + (BUN / 2.8) + (glucose / 18)
21. Normal plasma osmolality is between: 275 and 295 mOsm/kg
22. If there is a large gap between the calculated and actual measured Osmo-
lality...: Then something else must be present in large quantities
Study online at https://quizlet.com/_i1hled
1. Body water over lifespan: Decreases
we become raisins!
2. 2 fluid compartments: Intracellular
Extracellular
3. fluid compartment: intracelullar: Within the cell
•2/3 of body's fluid is within the cell
4. Fluid compartment: extracellular: Interstitial
Intravascular (plasma)
Transcellular
examples:
•CSF
•Digestive juices
•Mucus
5. Calculation of Fluid Gain or Loss: •One liter of water weighs 2.2 lb (1 kg)
•Body weight change is a great indicator of overall fluid volume loss or gain
6. What is the most accurate way to determine fluid gain or loss: Weighing Is the most
accurate way.
7. Electrolytes and the two types of ions: •Substances whose molecules dissociate into ions when
placed in water
-Cations: positively charged
-Anions: negatively charged
An Equivalent is an expression of the chemical combining power of an electrolyte in a fluid
8. Electrolytes concentration is expressed in...: mEq/L
9. Mechanisms controlling Fluid and Electrolyte Movement: Diffusion
Osmosis
10. Diffusion: Movement of molecules from high to low concentration
11. Osmosis: Movement of water across a membrane from LOW solute concentration to HIGH
, NUR206 Fluids & Electrolytes
Study online at https://quizlet.com/_i1hled
12. Osmotic pressure: Amount of pressure required to prevent the inward flow of water across a semiperme-
able membrane
13. Osmolarity measures the: total milliosmoles/L of solution(mOsm)
14. Osmolality measures the: number of milliosmoles/kg of water
15. Osmotic Pressure Effects on Red Blood Cells: Hypertonic
Isotonic
Hypotonic
16. Osmolarity vs tonicity: are related but distinct concepts. ... The terms are different because osmolarity
takes into account the total concentration of penetrating solutes and non-penetrating solutes, whereas tonicity takes
into account the total concentration of only non-penetrating solutes.
17. Isotonic RBC: In an isotonic environment, the relative concentrations of solute and water are equal on both
sides of the membrane.
Red blood cell normal
18. Hypotonic RBC: red blood cell will bloat up and may explode,
19. Hypertonic RBC: water will leave the cell, and the cell will shrink
20. Measurement of Plasma Osmolality: Calculate the plasma osmolality using the following formu-
la
Plasma Osmolality = (2 x Na) + (BUN / 2.8) + (glucose / 18)
21. Normal plasma osmolality is between: 275 and 295 mOsm/kg
22. If there is a large gap between the calculated and actual measured Osmo-
lality...: Then something else must be present in large quantities
