Transcript Microscope Review

Microscope Review
The diagram represents a cell in the field of view
of a compound light microscope. In which
direction should the slide be moved on the
microscope stage to center the cell in the field
of view?
down towards C
A student views some cheek cells
under low power. Before switching
to high power, the student should
Center the image being
Focus with the coarse adjustment
A student changes the objective of a
microscope from 10x to 50x. If this is
the only change made, what will happen
to the field of view?
The field of view will decrease.
The amount of light will decrease.
When an onion cell is stained with
iodine, which organelle becomes
more visible under the compound
light microscope?
nucleus
To locate a specimen on a prepared slide
with a compound microscope, Why must
a student should begin with the lowpower objective rather than the highpower objective?
The field of vision is larger under low
power than under high po.er
1. Which substance could be added to the
slides to make the details more visible?
a stain
2. What is the name of the stain used for
animal cells?
methylene blue
3. What is the name of the stain used for
plant cells?
iodine
The diagram represents the field of view of a
compound light microscope. Three unicellular
organisms are located across the diameter of
the field. What is the approximate length of
each unicellular organism?
500um
Give the name and function of
each structure labeled.
E
A – Eyepiece / Ocular: structure
you look through
B – Fine adjustment: used to
focus under high power
C – Arm – used to hold the
microscope
D – High power objective :
more magnification, gives
a smaller field of you
E – Course adjustment – used
to focus ONLY under low
power
F
1. What was the highest
possible magnification
that can be obtained
when using this
microscope?
10 x x 40x = 400x
2. What happens to the
amount of light in the
field of view when
switching from low to
high power?
amount of light
decreases
E
F
The diagram represents a hydra as viewed with a
compound light microscope. If the hydra moves to
the right of the slide preparation, which diagram
below best represents what will be viewed through
the microscope?
A
B
1. What type of cells are seen in the above picture? How do you
know? Animal cell – it is circular
2. Identify the labeled structures and give the function of each.
A: nucleus
B: cell membrane
3. What was done to make the cell parts more visible? stain