45
6-9.
All of the following are components of the
microscopes illumination system EXCEPT
1.
internal light source
2.
condenser
3.
external light source
4.
iris diaphragm
6-10.
The total magnification available by using
the lens color coded red is
1.
1000X
2.
450X
3.
100X
4.
10X
6-11.
Light travels from the objective to the
ocular lens through what component of the
microscope?
1.
Body tube
2.
Iris diaphragm
3.
High-powered lens
4.
Revolving nosepiece
6-12.
What objective should be used for a
detailed study of stained bacterial smears?
1.
Low power
2.
High dry
3.
Oil immersion
4.
Either 2 or 3 above
6-13.
If necessary, which, if any, of the following
substances may be used for cleaning the
lenses on a microscope?
1.
Alcohol
2.
Bleach
3.
Xylene
4.
None of the above
6-14.
A CBC includes which of the following?
1.
Total RBC count
2.
Hematocrit
3.
Differential WBC count
4.
All of the above
6-15.
The hemacytometer is designed primarily
for what purpose?
1.
To differentiate between red blood
cells and white blood cells
2.
To count white blood cells
3.
To count red blood cells
4.
Both 2 and 3
6-16.
The main reason for using the cover glass
included with the hemacytometer instead of
an ordinary cover glass is because the
hemacytometer cover glass
1.
is clearer
2.
has an even surface
3.
is thicker
4.
is less likely to break
6-17.
A subnormal RBC count may indicate that
the patient has which of the following listed
conditions?
1.
Leukopenia
2.
Anemia
3.
Dehydration
4.
Uremia
6-18.
What is the total capacity of the capillary
pipette provided in a Unopette® for RBC
count?
1.
0.5µl
2.
1.0µl
3.
10.0µl
4.
100.0µl
6-19.
Which of the following conditions indicates
that the counting chamber is properly
loaded?
1.
There is a thin, even film of fluid
under the coverglass
2.
The fluid flows into the grooves at the
edges of the chamber
3.
Air bubbles are seen in the field
4.
The chamber is flooded