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Cell Biology > 1.2 > Flashcards

1.2 Flashcards

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1
Q

Who is credited with the development of the cell theory?

A

Schleiden, Schwann, and Virchow

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2
Q

What are the three main components of the cell theory?

A

All living organisms are composed of cells, the cell is the basic unit of life, and all cells come from pre-existing cells

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3
Q

True or False: The cell theory states that all cells have a nucleus.

A

False

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4
Q

What is the function of a microscope?

A

To magnify and visualize small objects or organisms

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5
Q

What type of microscope uses a beam of electrons to create a detailed image of a specimen?

A

Electron microscope

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6
Q

Fill in the blank: The _______ microscope uses light to pass through a specimen and magnify it.

A

Light

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7
Q

What is the term for the ability of a microscope to distinguish between two separate points?

A

Resolution

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8
Q

What is the term for the total magnification of a microscope?

A

Ocular lens magnification x Objective lens magnification

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9
Q

What is the term for the ability of a microscope to show fine detail of a specimen?

A

Clarity

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10
Q

True or False: Electron microscopes have a higher resolution than light microscopes.

A

True

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11
Q

What is the function of the condenser in a microscope?

A

To focus light onto the specimen

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12
Q

Fill in the blank: The _______ lens is the lens closest to the specimen in a microscope.

A

Objective

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13
Q

What is the term for the ability of a microscope to maintain focus when changing magnification?

A

Parfocality

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14
Q

What is the term for the distance between the objective lens and the specimen in focus?

A

Working distance

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15
Q

True or False: A compound microscope uses multiple lenses to magnify a specimen.

A

True

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16
Q

What is the term for the part of a microscope that holds and magnifies the specimen?

A

Stage

17
Q

Fill in the blank: The _______ microscope is commonly used in educational settings for viewing larger specimens.

A

Compound

18
Q

What is the function of the iris diaphragm in a microscope?

A

To control the amount of light entering the lens system

19
Q

What is the term for the lens through which you look to view the specimen in a microscope?

A

Ocular

20
Q

True or False: A scanning electron microscope is used to view the internal structures of cells.

A

False

21
Q

What is the term for the process of staining cells to enhance contrast under a microscope?

A

Histology

22
Q

Fill in the blank: The _______ microscope uses a beam of electrons to create a 3D image of a specimen’s surface.

A

Scanning electron

23
Q

What is the term for the process of cutting thin slices of a specimen for viewing under a microscope?

A

Sectioning

24
Q

True or False: A transmission electron microscope is used to view the internal structures of cells.

A

True

25
Q

What is the term for the process of illuminating a specimen in a microscope?

A

Lighting

26
Q

Fill in the blank: The _______ lens is the lens through which light passes after leaving the objective lens in a microscope.

A

Ocular

27
Q

What is the term for the process of adjusting the focus of a microscope to see different parts of a specimen?

A

Focusing

28
Q

True or False: A phase contrast microscope is used to view living cells without staining.

A

True

29
Q

What is theory

A

Supported by evidence

30
Q

Which microscope is used for greatest resolving

A

Electron transmission

Cell Biology (5 decks)

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