microscopy Flashcards
What is an organelle?
Specialised structures found within a living cell.
Define resolution in microscopy.
The ability to distinguish between objects that are close together.
What is the function of the nucleus?
An organelle found inside a cell which contains genetic information.
Where does aerobic respiration take place?
In the mitochondria.
What is the role of chloroplasts?
A plant organelle where the stages of photosynthesis take place.
What was unknown before the invention of microscopes?
Cells, sperm, bacteria, and other micro-organisms.
What is a microscope?
An instrument that is used to magnify objects that are too small to see with the naked eye.
What can be observed using high-power microscopes?
Cell organelles.
What is the maximum magnification of a light microscope?
× 1500.
What is the maximum resolution of a light microscope?
200 nm.
True or False: Light microscopes can observe sub-cellular structures.
True.
What is the purpose of histopathologists in hospitals?
To analyze tissue samples using microscopy.
What type of light is used in light microscopes?
Visible light.
When were light microscopes first developed?
In the 16th century.
What do electron microscopes use to visualize specimens?
A beam of electrons in a vacuum.
What is the maximum magnification of an electron microscope?
Up to x 500 000.
What is the resolution capability of electron microscopes?
As great as 0.1 nm.
Fill in the blank: Samples for light microscopy are stained using _______.
methylene blue.
Fill in the blank: The images produced by electron microscopes are called _______.
electron micrographs.
What type of cells can be observed under a light microscope?
Human cheek cells, mitochondria, and chloroplasts in plant cells.
