1.2 Flashcards
(30 cards)
Who is credited with the development of the cell theory?
Schleiden, Schwann, and Virchow
What are the three main components of the cell theory?
All living organisms are composed of cells, the cell is the basic unit of life, and all cells come from pre-existing cells
True or False: The cell theory states that all cells have a nucleus.
False
What is the function of a microscope?
To magnify and visualize small objects or organisms
What type of microscope uses a beam of electrons to create a detailed image of a specimen?
Electron microscope
Fill in the blank: The _______ microscope uses light to pass through a specimen and magnify it.
Light
What is the term for the ability of a microscope to distinguish between two separate points?
Resolution
What is the term for the total magnification of a microscope?
Ocular lens magnification x Objective lens magnification
What is the term for the ability of a microscope to show fine detail of a specimen?
Clarity
True or False: Electron microscopes have a higher resolution than light microscopes.
True
What is the function of the condenser in a microscope?
To focus light onto the specimen
Fill in the blank: The _______ lens is the lens closest to the specimen in a microscope.
Objective
What is the term for the ability of a microscope to maintain focus when changing magnification?
Parfocality
What is the term for the distance between the objective lens and the specimen in focus?
Working distance
True or False: A compound microscope uses multiple lenses to magnify a specimen.
True
What is the term for the part of a microscope that holds and magnifies the specimen?
Stage
Fill in the blank: The _______ microscope is commonly used in educational settings for viewing larger specimens.
Compound
What is the function of the iris diaphragm in a microscope?
To control the amount of light entering the lens system
What is the term for the lens through which you look to view the specimen in a microscope?
Ocular
True or False: A scanning electron microscope is used to view the internal structures of cells.
False
What is the term for the process of staining cells to enhance contrast under a microscope?
Histology
Fill in the blank: The _______ microscope uses a beam of electrons to create a 3D image of a specimen’s surface.
Scanning electron
What is the term for the process of cutting thin slices of a specimen for viewing under a microscope?
Sectioning
True or False: A transmission electron microscope is used to view the internal structures of cells.
True
