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2.1 Cell Structure > Slides And Photomicrographs > Flashcards

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

What is the equation used to calculate size of an image under a microscope?

Magnification=image/actual