Exam (elaborations)
CIULLA AUBF EXAM LATEST UPDATE
- Course
- Institution
CIULLA AUBF EXAM LATEST UPDATE...
[Show more]
Content preview
CIULLA AUBF EXAM LATEST UPDATEWhy is the first-voided morning urine specimen the most desirable
specimen for routine urinalysis?
A. Most dilute specimen of the day and therefore any chemical
compounds present will not exceed the detectability limits of the
reagent strips
B. Least likely to be contaminated with microorganisms because the
bladder is a sterile environment
C. Most likely to contain protein because the patient has been in the
orthostatic position during the night
D. Most concentrated specimen of the day and therefore it is more
likely that abnormalities will be detected
D. Most concentrated specimen of the day and therefore it is more
likely that abnormalities will be detected
First-voided morning urine
- is most desirable for chemical and microscopic analysis since it is
the most concentrated specimen.
- Protein, nitrite and specific gravity, sediment examination prefers
this sx.
Glucose metabolism is better assessed in postprandial specimen.
The physical characteristic of color is assessed when a routine
urinalysis is performed. What substance is normally found in urine
that is principally responsible for its yellow coloration?
A. Bilirubin
B. Melanin
C. Carotene
,D. Urochrome
D. Urochrome
- yellow-brown pigment derived from urobilin
- principally responsible for the yellow coloration of normal urine
- excreted at a constant rate (no diurnal variation)
- Color of normal urine (range from straw to deep amber)
- Dependent on the concentrating ability of the kidney and the volume
of urine excreted.
Previous
Play
Next
Rewind 10 seconds
Move forward 10 seconds
Unmute
0:00
/
0:15
Full screen
Brainpower
Read More
In certain malignant disorders, what substance is found in the urine
that turns the urine dark brown or black on exposure of the urine to
air?
A. Urobilinogen
, B. Indican
C. Melanin
D. Porphyrin
C. Melanin
- substance derived from tyrosine
- responsible for the pigmentation of the eyes, skin, and hair
Melanomas
- malignancy
- tumor or mole takes on a darkly pigmented appearance because of
the melanin present.
Metastatic melanoma
- melanogen (colorless) precursor of melanin is excreted in the urine.
- If the urine is allowed to stand at RT for 24 hrs, the melanogen is
oxidized to melanin (dark brown or black)
Qualitative screening tests = ferric chloride or sodium nitroprusside
as the oxidation reagent systems.
What is the expected pH range of a freshly voided urine specimen?
A. 3.5-8.0
B. 3.5-9.0
C. 4.0-8.5
D. 4.5-8.0
D. 4.5-8.0
pH
- representative symbol for the hydrogen ion conc.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller luzlinkuz. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62890 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now