B1.1.3 - Light Microscopy Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Who was the first Scientist to see cells?

A

Scientist Robert Hooke

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When did Robert Hooke first see cells?

A

350 years ago

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How does a light microscope work?

A

It passes light through an object placed on a slide on the stage, and then through the 2 glass lenses.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the 2 different glass lenses called?

A

Objective lens and eyepiece lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the 2 knobs called?

A

Course focus knob

Fine focus knob

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which glass lens do you look through with your eye?

A

Eyepiece lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When first viewing cells, what position should the stage be at?

A

Lowest position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

When first viewing, which objective lens should you choose?

A

Lowest magnification lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is total magnification?

A

Eyepiece lens magnification

X

Objective lens magnification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why would you stain cells?

A

Because most are colourless and cells are easier to observe with stains

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What stain would you use to view the nucleus of an animal cell?

A

Methylene blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What stain would you use to view plant cell nuclei?

A

Iodine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What stains bacterial cell walls?

A

Crystal violet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How would you apply a stain?

A

Place the cells on a glass slide
Add 1 drop of stain
Place a coverslip on top
Tap on it lightly with a pencil to remove air bubbles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why would you use a plastic coverslip instead of a glass coverslip?

A

The glass coverslip may shatter under the pressure of the pencil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the maximum resolution for the light microscope?

A

0.2 micro meters

17
Q

What are the advantages to light microscope?

A
They can view living specimens
They can view in colour
They are cheap
Easy to operate 
Portable
18
Q

What are the disadvantages of light microscopes?

A

They can’t view cells in as much detail as electron microscopes