Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
51 Cards in this Set
- Front
- Back
The prefix femto correlates to a factor of: |
10^-15 |
|
The prefix micro correlates to a factor of: |
10^-6 |
|
The prefix milli correlates to a factor of: |
10^-3 |
|
The prefix centi correlates to a factor of: |
10^-2 |
|
The prefix deci correlates to a factor of: |
10^-1 |
|
Lab results are often expressed as concentration (moles) or mass (mg/dL, g/L, mmol/L and IU) rather than SI units |
Lab results are often expressed as concentration (moles) or mass (mg/dL, g/L, mmol/L and IU) rather than SI units |
|
Deionized water: |
Purified by ion exchange (some or all ions removed); NOT pure or sterile |
|
Reverse osmosis: |
Water runs across asemipermeable membrane |
|
Lab requirements generally call for ____________ grade water |
reagent |
|
Solute: |
Substance dissolved in a liquid |
|
Analytes: |
Solutes or what is being tested |
|
Solvent: |
Liquid in which solute is dissolved |
|
Solution |
Solute plus solvent |
|
Molarity (M): |
M= moles/L where a mole = gram/gmw |
|
Molality (m): |
Amount of solute/1 kg of solvent |
|
Normality |
The number of gram equivalent weights per 1 L ofsolution, where an equivalent weight is the gmw divided by its valencei^h�� |
|
Redox potential measures: |
The ability of solution toaccept/donate electrons |
|
Conductivity measures: |
how well electricitypasses through a solution |
|
Osmotic pressure is the pressure that: |
opposes osmosis |
|
Vapor pressure is the pressure at which: |
the liquid solvent is inequilibrium with the water vapor |
|
Freezing point is the temperature at which: |
the vapor pressure ofsolid and liquid are the same |
|
Boiling point is the temperature at which: |
the vapor pressure ofsolvent reaches 1 atm. |
|
pH is the inverse log of ___________________ concentration. |
hydrogen ion |
|
Buffers are: |
Weak acids/bases and their related salts thatminimize changes in hydrogen ion concentration. |
|
Henderson-Hasselbalch equation describes: |
the dissociationcharacteristics of weak acids (pKa) and bases (pKb) and their effect on pH |
|
Normal blood pH = |
7.35-7.45 |
|
Celsius to Fahrenheit: |
°C (9/5) + 32 |
|
Fahrenheit to Celsius: |
(°F -32) 5/9 |
|
Graduated pipettes: |
have marks indicatingvarious volumes (serologic) |
|
Transfer pipettes: |
designed to dispenseone volume without further subdivision (volumetric) |
|
What kind of pipette should be used when dilutingstandards, calibrators or QC materials? |
Transfer pipettes (volumetric) |
|
What type of pipette has the greatest degree of accuracy and precision? |
Transfer pipettes (volumetric) |
|
Dessicants are: |
drying agents thatremove moisture from air/substances; important in urinalysis dipstick reagents |
|
Centrifuge speed is measured using a _____________. |
tachometer |
|
In dialysis, a solution is put in a bag or on one side of a ____________________; larger moleculesremain in bag or on one side of membrane while smaller ones diffuse out. |
semipermeable membrane |
|
How many significant figures does 814.2 have and how is it written in scientific notation? |
4 significant figures; 8.142x10^2 |
|
How many significant figures does 0.000641 have and how is it written in scientific notation? |
3 significant figures; 6.41x10^-4 |
|
Specific gravity is the ratio of the density of a material compared to the density of ____________. |
pure water. |
|
% w/w = |
grams solute/100 gsolution |
|
% w/v = |
grams solute / 100 mLsolution |
|
% v/v = |
mL solute / 100 mLsolution |
|
A dilution is the ratio of the patient sample to the _________________. |
total final volume (patient sample +diluent) |
|
Simple dilutions are commonly used when: |
lab result fallsabove linearity |
|
Serial dilutions are commonly used when: |
thevolume of sample/diluent is in short supply and needs to be minimized or whendetermining a titer. |
|
The Beer-Lambert Law is the relationship between: |
concentration andabsorbance A = abc (where A = absorbance; a =absorptivity constant; b = length of light path; c = concentration) |
|
Plasma: |
liquid portion of anti-coagulated blood; green top tube(heparin) |
|
Serum: |
liquid portion of clotted blood; red top or gold top (SST)tubes |
|
Cerebral spinal fluid: |
test for protein and glucose to help determine ifthere is an infection (meningitis) |
|
Analytes impacted by hemolysis include: |
potassium, magnesium, LDH, iron |
|
One sample that requires light protection is: |
bilirubin |
|
Samples that need to be delivered on ice include: |
lactic acid, ammonia |