Studying Cells by Microscopy (OCR A-Level Biology A): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
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Practise the cards
10 cards from this deck
First to observe cells & when
First to observe cells & when
Robert Hooke, 1660s
TEM max magnification & resolution
TEM max magnification & resolution
×500,000 & 0.2 nm
SEM max magnification & resolution
SEM max magnification & resolution
×100,000 & 10 nm
Light microscope max magnification & resolution
Light microscope max magnification & resolution
×1500 & 200 nm
Magnification formula
Magnification formula
Image length ÷ real length
Resolution definition
Resolution definition
Ability to distinguish two adjacent points as separate
TEM vs SEM: what each shows
TEM vs SEM: what each shows
TEM: internal ultrastructure; SEM: surface details/3D
Laser confocal microscope advantage
Laser confocal microscope advantage
Eliminates blur from out-of-focus tissue
Total magnification (light microscope)
Total magnification (light microscope)
Eyepiece magnification × objective magnification
Why specimens need staining
Why specimens need staining
Tissue is transparent; stains make structures visible