Definitions for Cell Structure
Term / DefinitionMagnification formula / Magnification = power of objective lens x power of eyepiece lens
Stage / The stage holds the slide which contains the specimen to be viewed
Diaphragm / The diaphragm controls the amount of light reaching the specimen
Fine focus / The fine focus sharpens the image under high and low power. It moves the stage by small amounts
Coarse focus / The coarse focus focuses the image under low power
Objective lens / A lens attached to the nosepiece which magnifies the specimen
Eyepiece lens / The eyepiece lens magnifies the image, usually 10 times
Magnification formula / Magnification = power of objective lens x power of eyepiece lens
Compound Microscope / A microscope that uses two lenses for magnification
Protoplasm / The Protoplasm is all the living parts of the cell
Function of the cell wall / The cell wall gives strength to the cell
Function of the vacuole / The vacuole gives the cell strength and stores water, salts and sugars
Cytoplasm / The cytoplasm is the jelly like material outside the nucleus
Ultrastructure of the cell / Cell ultrastructure is the fine details of the cell that can be seen using an electron microscope
Cell membrane / The cell membrane is a thin membrane around the cell that is made of phospholipids and proteins
Function of cell membrane / Cell membranes retain the cell contents and they control what goes in and out of the cell
Nucleus / The nucleus is the control centre of the cell
Chromatin / Chromatin consists of DNA and proteins that makes up a chromosome when it is not dividing
Nucleolus / The nucleolus is an area of the nucleus where ribosomes are made
Mitochondria / The mitochondria supply energy to the cell. Respiration occurs here
Chloroplasts / Chloroplasts are only found in plant cells. They are the green structure where photosynthesis takes place.
Cell Walls / Cell walls are only found in plant cells. They are made of cellulose.
Function of cell wall / The function of the cell wall is to give strength and support to the plant cell. They are fully permeable.
Ribosomes / Ribosomes are tiny structures which are made of DNA and protein. Their function is to make proteins.
Prokaryotic Cells / Prokaryotic Cells do not have a nucleus or membrane bound organelles
Eukaryotic Cells / Eukaryotic Cells have a nucleus and cell organelles
Electron Microscope / A microscope that achieves much greater magnification than a light microscope as it uses a parallel beam of electrons to illuminate the object instead of a beam of light
Term / Definition
Magnification formula
Stage
Diaphragm
Fine focus
Coarse focus
Objective lens
Eyepiece lens
Magnification formula
Compound Microscope
Protoplasm
Function of the cell wall
Function of the vacuole
Cytoplasm
Ultrastructure of the cell
Cell membrane
Function of cell membrane
Nucleus
Chromatin
Nucleolus
Mitochondria
Chloroplasts
Cell Walls
Function of cell wall
Ribosomes
Prokaryotic Cells
Eukaryotic Cells
Electron Microscope
Term / Definition
Magnification = power of objective lens x power of eyepiece lens
The stage holds the slide which contains the specimen to be viewed
The diaphragm controls the amount of light reaching the specimen
The fine focus sharpens the image under high and low power. It moves the stage by small amounts
The coarse focus focuses the image under low power
A lens attached to the nosepiece which magnifies the specimen
The eyepiece lens magnifies the image, usually 10 times
Magnification = power of objective lens x power of eyepiece lens
A microscope that uses two lenses for magnification
The Protoplasm is all the living parts of the cell
The cell wall gives strength to the cell
The vacuole gives the cell strength and stores water, salts and sugars
The cytoplasm is the jelly like material outside the nucleus
Cell ultrastructure is the fine details of the cell that can be seen using an electron microscope
The cell membrane is a thin membrane around the cell that is made of phospholipids and proteins
Cell membranes retain the cell contents and they control what goes in and out of the cell
The nucleus is the control centre of the cell
Chromatin consists of DNA and proteins that makes up a chromosome when it is not dividing
The nucleolus is an area of the nucleus where ribosomes are made
The mitochondria supply energy to the cell. Respiration occurs here
Chloroplasts are only found in plant cells. They are the green structure where photosynthesis takes place.
Cell walls are only found in plant cells. They are made of cellulose.
The function of the cell wall is to give strength and support to the plant cell. They are fully permeable.
Ribosomes are tiny structures which are made of DNA and protein. Their function is to make proteins.
Prokaryotic Cells do not have a nucleus or membrane bound organelles
Eukaryotic Cells have a nucleus and cell organelles
A microscope that achieves much greater magnification than a light microscope as it uses a parallel beam of electrons to illuminate the object instead of a beam of light