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BIOLOGY LAB > 3/2- Lab 5- Exam 2 > Flashcards

3/2- Lab 5- Exam 2 Flashcards

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1
Q

What is the function of the ocular?

A

Magnifies objects 10x their size

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2
Q

What is the function of the head?

A

Holds ocular

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3
Q

What is the function of the arm?

A

Supports head, stage and adjustment knob

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4
Q

What is the function of the prism slide bar?

A

Directs the beam of light between the ocular and computer

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5
Q

What is the function of the revolving nosepiece?

A

Revolving part where the objectives are attached

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6
Q

What is the function of the objectives?

A

4 lenses

Scanning (4x)
Low (10x)
High- dry (40x)
Oil immersion (100x)

Magnification

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7
Q

What is the function of the stage?

A

Supports slide over a hole that admits light from the light source

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8
Q

What is the function of the mechanical stage knobs or the X and Y movement of the stage?

A

One controls forward/ back movement

Other controls right/ left movement

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9
Q

What is the function of the rheostat?

A

Regulates voltage and light intensity

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10
Q

What is the function of the condenser?

A

Focuses light onto specimen

Always be in the highest position

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11
Q

What setting should the condenser adjustment knob be on?

A

Condenser should always be in its highest position

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12
Q

What is the function of the coarse adjustment knob?

A

Focus by lowering stage

Used with 4x and 10x magnification

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13
Q

What is the function of the fine adjustment knob?

A

For final focus by raising or lowering stage

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14
Q

What is the working distance?

A

Space between the objective lenses and slide

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15
Q

What is the diameter of the field view?

A

Decrease as magnification increases

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16
Q

What does paracentric mean?

A

Object must be centered before rotating objective

17
Q

What is the depth of focus?

A

The ability to see through the thickness of a specimen

Higher magnification it becomes more apparent

18
Q

What does the iris diaphragm do?

A

Adjusts light that goes through the specimen

BIOLOGY LAB (5 decks)

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