Urinalysis Ch 4 MC

The refractive index compares: A. Light velocity in solutions with light velocity in solids B. Light velocity in air with light velocity in solutions C. Light scattering by air with light scattering by solutions D. Light scattering by particles in solutions

light velocity in air with light velocity in solutions

An antidiuretic hormone deficiency is associated with a: A. Specific gravity close to 1.025 B. Low specific gravity C. High specific gravity D. Variable specific gravity

low specific gravity

A specimen with a specific gravity of 1.040 and a 1+ glucose and a negative reagent strip protein is most likely caused by: A. Glucose B. Protein C. Diabetes insipidus D. Radiographic contrast media

radiographic contrast media

. Results of a specific gravity reading obtained by refractometer in the urology clinic do not agree with the readings obtained by the laboratory's automated reagent strip reader. The laboratory should: A. Recalibrate the reagent strip reader B. Check the calibration of the refractometer in the clinic C. Request the clinic to collect new specimens D. Report the results from the reagent strip reader

report the results from the reagent strip reader

Significant/Insignificant: WBCs

significant

Significant/Insignificant: bacteria

significant

Significant/Insignificant: lipids

significant

Which of the following statements concerning measurement of specific gravity by refractometer is not true? A. The refractometer must be calibrated after every specimen. B. This method is not affected by the temperature of the specimen. C. This method measures dissolved particles in the urine. D. The method requires less than 1 mL of urine

the refractometer must be calibrated after every specimen

TRUE/FALSE a urine specimen that remains at room tepm for several hours may develop a darker yellow color

true

TRUE/FALSE collection of a midtream clean catch specimen can affect the clarity of a urine specimen

true

TRUE/FALSE the density of a urine specimen can affect the frequency a sound wave

true

TRUE/FALSE urine SG can be measured by both physical and chemical methods

true

Acceptable/Unacceptable: A cloudy, brown-black urine with a positive test for blood and a strong odor of ammonia

unacceptable

Acceptable/Unacceptable: a pale yellow urne with a noticeable odor of bleach

unacceptable

The primary pigment responsible for normal urine color is: A. Uroerythrin B. Urochrome C. Hemoglobin D. Bilirubin

urochrome

The pigment responsible for a pink precipitate in refrigerated urine is: A. Uroerythrin B. Urochrome C. Bilirubin D. Biliverdin

uroerythrin

Which of the following specific gravity readings correlates with a pale yellow urine? A. 1.005 B. 1.015 C. 1.025 D. 1.035

1.005

A urine specific gravity measured by refractometer is 1.028, and the urine temperature is 29oC. The specific gravity should be reported as: A. 1.020 B. 1.025 C. 1.028 D. 1.031

1.028

A urine specimen is diluted 1:10, and the specific gravity reads 1.006. The actual specific gravity is: A. 1.006 B. 1.016 C. 1.060 D. 10.006

1.060

If a refractometer reads 1.003 with distilled water, the technologist should: A. Subtract 0.003 from the specimen results B. Add 0.003 to the specimen results C. Use a urinometer to measure the specific gravity D. Calibrate the refractometer by adjusting the set screw

Calibrate the refractometer by adjusting the set screw

A patient that has been diagnosed with diabetes mellitus will produce urine with: A. Increased volume and decreased specific gravity B. Decreased volume and decreased specific gravity C. Increased volume and increased specific gravity D. Decreased volume and increased specific gravity

Increased volume and increased specific gravity

Specimens that contain intact red blood cells can be visually distinguished from specimens that contain hemoglobin because: A. Hemoglobin produces a brighter red color B. Hemoglobin produces a cloudy pink specimen C.Intact red blood cells produce a cloudy specimen D. Intact red blood cells are rapidly converted to hemoglobin

Intact red blood cells produce a cloudy specimen

Acceptable/Unacceptable: A clear, pale yellow specimen with a specific gravity of 1.030

acceptable

Acceptable/Unacceptable: A hazy, yellow urine that produces a noticeable amount of white foam

acceptable

Acceptable/Unacceptable: a port wine colored specimen with a neg test for blood

acceptable

Urine from a patient diagnosed with hepatitis will appear: A. Pale yellow B. Amber C. Red D. Brown

amber

Bacterial decomposition of urea produces urine that has an odor resembling: A. Aromatic amines B. Asparagus C. Ammonia D. Bleach

ammonia

The addition of dilute acetic acid to a cloudy urine specimen will dissolve: A. Amorphous urates B. White blood cells C. Yeast D. Amorphous phosphate

amorphous phosphate

The presence of a white precipitate in freshly voided urine can be caused by: A. Amorphous urates in alkaline urine B. Amorphous urates in acid urine C. Amorphous phosphates in alkaline urine D. Amorphous phosphates in acid urine

amorphous phosphates in alkaline urine

Slightly warming a turbid urine specimen may dissolve: A. Talcum powder B. Amorphous urates C. Amorphous phosphate D. Radiographic contrast media

amorphous urates

A dark yellow urine producing yellow foam may contain: A. Hemoglobin B. Protein C. Red blood cells D. Bilirubin

bilirubin

Which of the following urine colors and causes match? A. Red—carotene B. Dark yellow—porphyrins C. Black—melanin D. Green—pyridium

black--melanin

The color of a urine specimen containing blood can be attributed to all of the following except the: A. Amount of blood B. Blood type of patient C. pH of the urine D. Length of contact

blood type of patient

Specific gravity is a measure of: A. Particle numbers B. Molecular weight C. Molarity D. Density

density

The specific gravity of urine is directly proportional to its: A. Turbidity B. Dissolved solids C. Salt content D. Glucose content

dissolved solids

The calibration of the refractometer can be quality-controlled using all of the following except: A. Distilled water B. 5% NaCl C. 9% sucrose D. Commercial controls

distilled water

TRUE/FALSE a clear yellow urine will no contain any pathologically significant constituents

false

TRUE/FALSE a pale yellow urine is a primary indication of impaired renal function

false

TRUE/FALSE a supervisor should be concerned if a SG reading of 1.008 is reported on a turbid urine specimen

false

TRUE/FALSE clear red urine and red plasma are associated with myoglobinuria

false

TRUE/FALSE urine SG is equally influenced by the presence of glucose and sodium

false

A urine specimen that turns black after standing may contain: A. Porphobilinogen B. Homogentisic acid C. Carboxyhemoglobin D. Myoglobin

homogentisic acid

Significant/Insignificant: amorphous urates

insignificant

Significant/Insignificant: radiographic contrast media

insignificant

Significant/Insignificant: squamous epithelial cells

insignificant

17. A urine with the same specific gravity as the ultrafiltrate is called: A. Isosthenuric B. Hyposthenuric C. Ultrasthenuric D. Hypersthenuric

isosthenuric