Biology 1407 Lab Exam 1 Questions With Complete
Solutions
ocular
Also known as the eyepiece, the ocular contains a lens that
magnified the specimen 10x
Body tube
The part connects the ocular to the arm of the microscope. You
should notice what the body tube rotates 360 degrees.
Arm
The arm supports the body tube and is used as a handle to carry
most microscopes
Coarse focus
This large knob is located on the arm and is used to move the
stage up and down in large increments. The purpose is to bring
the specimen into resolution so that it may be seen under a high
magnification
Fine focus
The smaller knob is also located on the arm and is used to move
the stage in smaller increments. The fine focus should be used to
when usding the low or high powered objective
Base
The heaviest part of the microscope that is used as support and
stabilizes the instrument.
, Diaphragm
The disc-shaped structure is located under the stage and
regulates the amount of light a specimen receives. The smaller
holes allow less light, while the larger holes allow for more light
to pass across a specimen.
Stage
The horizontal platform used to hold a specimen.
mechanical stage
These chrome knobs located near the back of the stage are used
to move the slide left or right, up or down.
revolving nosepiece
The structure attached to the underside of the body tube that
holds the objectives. The nose-piece revolves to easily move
between objectives while viewing specimens
Objectives
The three or four cylindrically shaped structures used in the
magnification process. The objectives on your microscope have
various magnifications.
scanning objective
4x (red)
Low powered objective
10x (yellow)
high powered objective
Solutions
ocular
Also known as the eyepiece, the ocular contains a lens that
magnified the specimen 10x
Body tube
The part connects the ocular to the arm of the microscope. You
should notice what the body tube rotates 360 degrees.
Arm
The arm supports the body tube and is used as a handle to carry
most microscopes
Coarse focus
This large knob is located on the arm and is used to move the
stage up and down in large increments. The purpose is to bring
the specimen into resolution so that it may be seen under a high
magnification
Fine focus
The smaller knob is also located on the arm and is used to move
the stage in smaller increments. The fine focus should be used to
when usding the low or high powered objective
Base
The heaviest part of the microscope that is used as support and
stabilizes the instrument.
, Diaphragm
The disc-shaped structure is located under the stage and
regulates the amount of light a specimen receives. The smaller
holes allow less light, while the larger holes allow for more light
to pass across a specimen.
Stage
The horizontal platform used to hold a specimen.
mechanical stage
These chrome knobs located near the back of the stage are used
to move the slide left or right, up or down.
revolving nosepiece
The structure attached to the underside of the body tube that
holds the objectives. The nose-piece revolves to easily move
between objectives while viewing specimens
Objectives
The three or four cylindrically shaped structures used in the
magnification process. The objectives on your microscope have
various magnifications.
scanning objective
4x (red)
Low powered objective
10x (yellow)
high powered objective
