Cell and Microscopes
­ e­mail,
­ quiz
­ homework
­ onion cell diagrams
­ labels
­ magnification
­ size
­ scale
­ condition
­ explanation
­ cheek cells
1
Quiz # Name:__________
1. Name the following microscope parts:
a.
b.
c.
2. What is the total magnification at medium power?
3. What are the smallest building blocks of life?
4. What allows materials to move in and out of a cell?
5. From where do offspring get their genetic information?
6. Where is this information kept in a cell?
7. Do you start with low power all the way up, all the way down,
or half way in between?
8. If you lose sight of a cell at medium power, what should you
do?
2
Onion Cells
­ title, labels
­ magnification, condition
­ explanation
what does this show?
total magnification
stain
mount
3
Allium sp Epidermis
cell wall
cell membrane
nucleus
nucleolus
cytoplasm
vacuole
oil drop
granule
total magnification
stained with iodine
whole mount
In explanation tell:
what it is
total magnification
use of stain
4
Lab: What Have I Been Eating???
How to Make a Wet Mount
1. Make a wet mount slide of a piece of human cheek cell
epidermis. Scrape the inside of your cheek with the
blunt end of a toothpick. Stir the goo around on a drop
of water on the slide! Yum Yum!!
2. Add a drop of methylene blue stain to 1 side of the cover
slip. Raise and lower the slip a few times to get the stain
to cover the cheek cells.
3. Focus clearly at low power.
4. Centre your specimen, go to medium power. Focus.
5. Centre your specimen, go to high power. Focus.
6. Draw what you see on blank paper. Stipple and use
fine sharp pencil lines. Don't shade.
5
6
7
Homework
Homo sapiens Epidermis
cell membrane
cytoplasm
nuclear membrane
nucleolus
nucleoplasm
granule
ridge of cell membrane
methylene blue
whole mount
8