Module 7 Lesson 1 Flashcards
Prokaryotic Cells
microscopic, unicellular organism without a nucleus or other membrane-bound organelles.
Eukaryotic Cells
unicellular organism with membrane-bound nucleus and organelles; GENERALLY LARGER AND MORE COMPLEX THEN A PROKARYOTIC CELL
Cell Theory
states that (1) organisms are made of one or more cells; (2) cells are the basic unit of life; and (3) all cells come only from other cells.
Plasma Membrane
flexible boundary that helps control what enters and leaves the cell.
Organelle
specialized internal cell structure that carries out specific cell functions such as protein synthesis and energy transformation.
Cell
basic unit of structure and organization of all living organisms.
Nucleus
the membrane-enclosed organelle within a cell that contains the chromosomes
Head
Carries Optical parts in the upper part of microscope
also referred to as body
Base
Microscopes support, carries illuminators
Arms
Connects the base to the head and the eyepiece tube to the base of the microscope. It gives support to the head of the microscope and it is also used when carrying the microscope
Eyepiece
part used to look through the microscope. Its found at the top of the microscope
also referred to as ocular
Eyepiece Tube
eyepiece holder. It carries the eyepiece just above the objective lens
Objective Lenses
major lenses used for specimen visualization. each lens increases in size and magnification
Nose Piece
Holds the objective lenses, is movable to look at different specimens on different magnifications
Adjustment knobs
knobs that are used to focus the microscope. There are two types of adjustment knobs i.e fine adjustment knobs and coarse adjustment knobs.
Stage
section in which the specimen is placed for viewing. They have stage clips that hold the specimen slides in place
Aperture
hole on the microscope stage, through which the transmitted light from the source reaches the stage
Microscopic Illuminator
the microscopes light source, located at the base. It is used instead of a mirror
Condenser
lenses that are used to collect and focus light from the illuminator into the specimen. They are found under the stage next to the diaphragm of the microscope.
Diaphragm
found under the stage of the microscope and its primary role is to control the amount of light that reaches the specimen.
also known as iris
Condenser Focus Knob
knob that moves the condenser up or down thus controlling the focus of light on the specimen.
