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NUR 1022C Lab Quiz 1.pdf
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Exam of 7 pages for the course Nursing at Unisa (NUR 1022C Lab Quiz)
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1NUR 1022C Lab Quiz 1
Question 1
The of the microscope holds and allows selection of the objective lenses.
ocular
stage
nosepiec
e
condens
er
Question 2
Humans can see objects as small as 0.1 mm. Leeuwenhoek's best microscope could
magnify objects to 300X. Which of the following would be invisible using Leeuwenhoek's
microscope?
Poliovirus, 30 nm
Pandora virus, 0.5 mm X
1 mm
Red blood cell, 8 μm
Escherichia coli, 1 μm X
4 μm
Question 3
Which of the following parts of the microscope magnifies the specimen to produce the
virtual image of the specimen?
Body
Condenser
Objective
lens
Ocular lens
Question 4
A microbiology student with a visual disability is viewing a sample
of Bacillus endospores in a phase contrast microscope that is linked to an iPad. By
"stretching" the image on the iPad screen, the student can increase the apparent size of
the endospores. How does this manipulation affect resolution and contrast? (No
software is being used to alter the image!)
Both magnification and resolution increase; contrast is unchanged.
Resolution and magnification will decrease because the screen is not as
good as the human eye.
Contrast will improve because the microscope is phase-contrast.
Page 1 of 7
, 2
Only the magnification can be increased; resolution and contrast are
unchanged.
Question 5
Page 2 of 7
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