Exam (elaborations)
OSMT Prep - All Subjects Questions and Answers 2024
- Course
- Institution
OSMT Prep - All Subjects Questions and Answers
[Show more]
Content preview
OSMT Prep - All Subjects Questions andAnswers
During tissue processing, what is the correct sequence of steps ?
a) clearing, dehydration, infiltration
b) clearing, infiltration, dehydration
c) dehydration, infiltration, clearing
d) dehydration, clearing, infiltration - Answer -d) dehydration, clearing, infiltration
If a person has A- blood, who can they receive from within the ABO blood group? -
Answer -A-, AB-
What is the purpose of fixation? - Answer -To stabilize proteins & colloidal material in
cells/tissues so that it becomes resistant to change/remains as lifelike as possible
Why is pure water neutral on the pH scale? - Answer -Water has equal amounts of
hydrogen and hydroxide atoms, therefore it is able to self ionize.
How can the formation of paraformaldehyde be avoided - Answer -Additives to formalin
such as buffers or methanol
What tube would be used to draw blood from a patient being tested for hematocrit? -
Answer -Lavender
What is a compound fixative? - Answer -Composed of 2 or more primary fixatives.
What is the normal pH of blood? - Answer -7.35-7.45
How many stool samples must be collected for an ova & parasites exam? Why? -
Answer -3 different samples from 3 different days because parasites can appear
sporadically.
What is serum used for in culture media? - Answer -Can either enrich or solidify media.
What is inspissation? - Answer -The process of denaturing & coagulating serum by
heating to 85 Celsius
What is basic (nutrient) media? - Answer -Contains common nutritional ingredients to
support the growth of non-fastidious organisms. Not normally plate media.
,What primary basic ingredient provides a carbon & energy source for bacteria growth? -
Answer -Carbohydrates (glucose)
Appromixmately how much blood is in a human adult body? - Answer -5L
What is the most common stain used for cytology testing? - Answer -PAP smear
(Papinicolaou's staining technique)
What are the four basic types of tissue? - Answer -Epithelial, connective, muscular,
nervous
A movement that takes a body part further away from it's central axis is called a(n): -
Answer -Abduction
Incomplete, partial hemolysis around bacterial colonies on a growth plate is called:
a) Alpha hemolysis
b) Beta hemolysis
c) Gamma hemolysis - Answer -a) Alpha hemolysis
What antiseptic is used to clean the venipuncture site? - Answer -70% isopropyl alcohol
Where are red blood cells produced in a fetus? - Answer -The liver
What does mean measure? - Answer -The average value of numbers within a set
What is a chromogen? - Answer -Added to media as an indicator by changing the colour
of a bacterial colony.
What colour would a Gram positive be? - Answer -purple-blue
What is a buffer system? - Answer -Helps to maintain a relatively constant pH. Chemical
compounds that covert strong acids and bases into weak ones.
What dye is used as the primary stain when performing a Gram Stain? - Answer -
Crystal/Gentian Violet
What is a blastoconidia? - Answer -Buds/ 'daughter cells' of yeasts. They can extend to
form a chain-like structure called pseudohyphae.
What is added to MacConkey plate media to make it selective? - Answer -Crystal violet
and bile salts inhibit the growth of gram positive bacteria
What is a protozoa? - Answer -Single-celled & microscopic, can infect most body sites.
, What is agglutination? - Answer -Clumping/aggregation of cells as a result of a reaction
with a specific antibody.
Why would a sputum sample be collected? - Answer -To help determine the presence
of microorganisms that can cause respiratory diseases. (bronchitis, pneumonia, TB)
What is the decolourizer used in the PAP stain? - Answer -Acid Alcohol
What are the two types of cardiac cells? - Answer -Mechanical and electrical
(pacemaker) cells
What type of microorganisms require live cell media? - Answer -Viruses (they need a
live host in order to multiply)
What is a helminth? - Answer -Parasitic worm that commonly infects the GI tract.
Why is starch commonly found in antimicrobial sensitivity testing media? - Answer -
Absorbs toxic by-products of bacteria that can interfere with the growth of other
bacteria/sensitivity testing.
What plate media would be used to isolate gonorrhea & meningitis? - Answer -Thayer-
Martin
Why is the Geimsa stain required for specimens containing potential Chlamydia
bacteria? - Answer -Chlamydia lacks a cell wall, therefore if Gram stain is performed,
results will always show up as Gram negative.
What is the purpose of immunoassay testing? - Answer -Detects low levels of antigens
Why must sterile distilled water be used for culture media? - Answer -Impurities in non-
sterile water may inhibit bacterial growth
In culture media, how are bile salts used as a selective agent? - Answer -Bile emulsifies
fat, which means it will inhibit most Gram positive bacteria.
Only allows for the growth of Gram negative bacteria.
What is a titer? - Answer -A serial dilution of a liquid sample to help determine the
approximate level of antibodies present in the sample.
Name 4 reasons for ordering a wound culture. - Answer -1. failure to heal
2. signs of infection
3. discharge
4. nonrespondent to antobiotic therapy
What type of bacteria require a ZN Stain? - Answer -Mycobacterium species (acid fast
bacteria)
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 millyphilip. 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)
76799 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now