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Gen Bio Prelims > Microscopy and the Discovery of the Cell > Flashcards

Microscopy and the Discovery of the Cell Flashcards

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Biology 101 flashcards
1
Q

Son of Hans Janssen

A

Zacharias Janssen

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2
Q

father of Zacharia Janssen

A

Hans Janssen

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3
Q

who discovered that the combination of two lenses in a particular arrangement was the secret of the better visualization and magnification of objects.

A

Hans Janssen and Zacharias Janssen

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4
Q

Who invented what would become the prototype for the compound miscroscope

A

Hans Janssen and Zacharias Janssen

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5
Q

when was the microscope first modified?

A

17th century

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6
Q

who modified the microscope during the 17th century

A

Robert Hooke

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7
Q

an english scientist and mechanical genius who pioneered the microscopic research

A

robert hooke

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8
Q

recognized as the English Father of microscopy

A

Robert Hooke

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9
Q

coined for the discovery of the cell in which he described it as looked like small monastery rooms.

A

robert hooke

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10
Q

who is the dutch maker of microscopes that was the first person to see live cells in 1665 using a microscope that he himself made

A

Antonie Van Leeuwenhoek

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11
Q

who was able to grind and polish purer glass rather than the poor quality, greenish glasses commonly used in his time into a lens

A

Antonie Van Leeuwenhoek

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12
Q

through his microscope, he made pioneeribg discoveries on protozoa, red blood cells, capillary systems, and life cycle of insects.

A

Antonie van leeuwenhoek

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13
Q

who’s invention paved the way fot he development of the world’s first practical microscope

A

Antonie Van Leeuwenhoek

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14
Q

what did Antonie Van Leeuwenhoek discover through his microscope?

A

protozoa
red blood cells
capillary systems
life cycle of insects
rotifers
bacteria
sperm cells

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15
Q

who made the hand-held microscope

A

antonie van leeuwenhoek

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16
Q

1st person to see a live cell

A

antonie van leeuwenhoek

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17
Q

1st person to discover cells

A

robert hooke

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18
Q

what did robert hooke use as a subject for his microscope

A

a cork

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19
Q

what did robert hooke base the term ‘cells’ on

A

the cells of a monastery

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20
Q

what was the key for more magnification

A

lenses with very short magnification

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21
Q

what improved both the resolution and magnificationbof the compound microscope

A

double convex and spherical lenses

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22
Q

who discovered tubercle and cholera bacilli

A

Robert Koch

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23
Q

what did Robert Koch discover

A

tubercle and cholera bacilli

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24
Q

a German physician and microbiologist who was among the monumental discoviers in microbiology

A

Robert Koch

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25
Q

what microscope now has a greater magnifying power and greater resolution

A

modern electron microscopes

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26
Q

what microscope uses beams of accelerated electrons as a source of illumination

A

electron microscope

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27
Q

what microscope uses electrostatic and electromagnetic lenses in forming the image by controlling the electron beam to focus it at a specific plane with a reference of specimen

A

electron microscope

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28
Q

What are the two parts of Jansenn’s microscope

A

objective and eyepiece

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29
Q

What major discovery was discovered by Robert Koch that also paved the way in improving the future microscopes?

A

two infectious bacteria, tubercle and cholera bacilli

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30
Q

This is also known as the body

A

Head

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31
Q

it carries the optical parts in the upper part of the microscope.

A

Head

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32
Q

acts as microscopes support.

A

Base

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33
Q

carriers the microscopic illuminators.

A

Base

34
Q

the part connecting the base to the head and the eyepiece tube to the base of the microscope

A

Arms

35
Q

It gives support to the head of the microscope and it also used when carrying the microscope.

A

Arms

36
Q

True or False:

Some high-quality microscopes have an articulated arm with more than one joint allowing more movement of the microscopic head for better viewing.

A

True

37
Q

True or False:

Some low-quality microscopes have an articulated arm with more than one joint allowing more movement of the microscopic head for better viewing.

A

False

38
Q

also known as the ocular.

A

Eyepiece

39
Q

used to look through the microscope.

A

Eyepiece

40
Q

found at the top of the microscope

A

Eyepiece

41
Q

what is the standard magnification of the eyepiece

A

10x

42
Q

the standard magnification of the eyepiece is 10x an optional eyepiece having magnification from

A

5X – 30X

43
Q

It’s the eyepiece holder.

A

Eyepiece tube

44
Q

It carries the eyepiece just above the objective lens.

A

Eyepiece tube

45
Q

True or False:

In some microscopes such as the binoculars, the eyepiece tube is flexible and can be rotated for maximum visualization, for variance in distance.

A

True

46
Q

True or False:

the eyepiece of every microscope’s tube is flexible and can be rotated for maximum visualization, for variance in distance.

A

False

47
Q

the eyepiece tube of these microscopes are none flexible

A

monocular microscopes

48
Q

major lenses used for specimen visualization

A

Objective lenses

49
Q

They have a magnification power of 40x-100X

A

Objective lenses

50
Q

True or False:

There are about 1- 4 objective lenses placed on one microscope, in that some are rare facing and others face forward.

A

True

51
Q

True or False:

Each lens has its own magnification power.

A

True

52
Q

True or False:

All lens has the same magnification power.

A

False

53
Q

revolving turret.

A

Nose piece

54
Q

It holds the objective lenses.

A

Nose piece

55
Q

It is movable hence it can revolve the objective lenses depending on the magnification power of the lens.

A

Nose piece

56
Q

knobs used to focus the microscope

A

The Adjustment knobs

57
Q

What are the two types of adjustment knobs

A

fine adjustment knobs
coarse adjustment knobs.

58
Q

the section on which the specimen is placed for viewing

A

Stage

59
Q

have stage clips hold the specimen slides in place

A

Stage

60
Q

The most common stage is

A

mechanical stage

61
Q

what allows the control of the slides by moving the slides on the stage instead of moving it manually.

A

mechanical knobs

62
Q

a hole on the microscope stage

A

Aperture

63
Q

the microscopes light source, located at the base

A

Microscopic illuminator

64
Q

used instead of a mirror

A

Microscopic illuminator

65
Q

used instead of a mirror

A

Microscopic illuminator

66
Q

lenses that are used to collect and focus light from the illuminator into the specimen

A

Condenser

67
Q

found under the stage next to the diaphragm of the microscope

A

Condenser

68
Q

play a major role in ensuring clear sharp images are produced with a high magnification of 400X and above

A

Condenser

69
Q

True or False:

The higher the magnification of the condenser, the more the image clarity

A

True

70
Q

True or False:

The lower the magnification of the condenser, the more the image clarity

A

False

71
Q

also known as the iris

A

Diaphragm

72
Q

found under the stage of the microscope and its primary role is to control the amount of light that reaches the specimen.

A

Diaphragm

73
Q

an adjustable apparatus, hence controlling the light intensity and the size of the beam of light that gets to the specimen

A

Diaphragm

74
Q

True or False:

high-quality microscopes, the diaphragm comes attached with an Abbe condenser and combined they are able to control the light focus and light intensity that reaches the specimen.

A

True

75
Q

True or False:

mid-quality microscopes, the diaphragm comes attached with an Abbe condenser and combined they are able to control the light focus and light intensity that reaches the specimen.

A

False

76
Q

a knob that moves the condenser up or down thus controlling the focus of light on the specimen.

A

Condenser focus knob

77
Q

a condenser specially designed on high-quality microscopes

A

Abbe Condenser

78
Q

what makes the condenser to be movable and allows very high magnification of above 400X

A

Abbe Condenser

79
Q

True or False:

high-quality microscopes normally have a high numerical aperture than that of objective lenses.

A

true

80
Q

True or False:

mid-quality microscopes normally have a high numerical aperture than that of objective lenses.

A

false

81
Q

controls how far the stages should go preventing the objective lens from getting too close to the specimen slide which may damage the specimen

A

The rack stop

82
Q

responsible for preventing the specimen slide from coming too far up and hit the object.

A

The rack stop

Gen Bio Prelims (5 decks)

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