Flashcards in Slides And Photomicrographs Deck (10):
1
What can an optical microscope be used to observe? (3)
Living organisms (amoeba)
Smear preparations of human blood and cheek cells
Thing sections of animal, plant and fungal tissue
2
What is light interference?
A way of observing a specimen without staining
3
What does light interference involve?
Dark background against which illuminated specimens show up
4
What stain is used to colour chromosomes dark red?
Acetic orcein
5
What is used to stain the cytoplasm of a cell?
Eosin
6
What does Sudan red stain?
Lipids
7
Iodine in potassium iodide stains starch blue/black. What colour does it stain cellulose?
Yellow
8
What happens to a specimen during the preparation process? (4)
Dehydrated
Embedded in wax
Special instrument makes small slices called sections
Stained and mounted in chemicals to preserve
9
Why are specimens embedded in wax?
To prevent distortion
10