For the WBC count, immediately after the contents of the pipet have been mixed
for about three minutes, it is necessary to:
a. Use a mechanical mixer.
b. Expel three to four drops.
Observe for even distribution of cells.
d. Refill both chambers of the hemacytometer.
After the WBCs have settled for about three minutes during a manual WBC count,
which powered magnification and lighting arrangements are used to focus on the
ruled area to observe for even distribution of WBC?
a. Low-power (10X); reduced light.
b. High-power (43X); bright light.
Oil immersion (97X); bright light.
d. High-power (43X); reduced light.
When counting WBCs, a variation of more than ___________ cells between any of
the four areas counted or a variation of more than _____________cells between
sides of the hemacytometer indicate uneven distribution and require that the
procedure be repeated.
a. 6; 12.
b. 7; 9.
d. 10; 18.