Introduction to Cells. Topic 2: Investigating Cells Standard Grade Biology. Magnification Cells can be seen more clearly using Microscopes _________________________ the cells Microscopes may have two or three__________________________________________
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Topic 2: Investigating Cells
Standard Grade Biology
Cells can be seen more clearly using
Microscopes _________________________ the cells
Microscopes may have two or
and one ___________________________________________.
To work out Total Magnification use the following formula
magnification of eyepiece lens
magnification of objective lens
These new units are called
1mm = 1000 µm
1 = 1 µm
Measuring Cell Size measurement.
We can use microscopes to estimate the size of cells we are looking at
e.g. if we know the diameter of the field of our field of view we can then estimate the size of the cells
Field of view
1mm (1000 µm)
0.5 mm (500 µm)
Human cheek cell
Staining Cells measurement.
Animal and plant cells can be
so that the
structures within cells
seen more clearly
Methyl Blue measurement.
used to stain the
human cheek cells
Acetic orcein measurement.
_________________________ is used to
stain the _________________________
present in the nucleus of cells which are
about to divide.
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