Biology - Microscopy and cell types Flashcards
To revise v2 (19 cards)
Define
Specialised cell
A cell that has special features to enables it to perfrom a specific function
Define
Celluar differentiation
Cellular differentiation is the process in which a stem cell changes from one type to a differentiated one.
List
Feature of a prokaryotes
- Has plasmid DNA without a nulcleus
- Have a cell mermbrane without cell wall
- Has ribsomes and other organelles that are not mermbrane bound
List
Features of a Eukaryote
- Has DNA witha nulcleus
- Has a cell mermbrane without cell wall(if animal) or with(if plant)
- Has ribsomes and other organelles that are mermbrane bound
List
4 units of meausurement in biology
- Nanometers(nm)
- Micrometer(µm)
- Millimeters(mm)
- Meters(m)
List
How to transistion between units
Smaller=x1000
Bigger= ÷1000
Average diameter
Red Blood cell
7.5µm
7500nm/1000
Average lenght
Tiger
3.9m
3900mm/1000
Average lenght
Microchondria
500µm
0.005mx1000x1000
1m to nanometers
1,000,000,000,000nm
1mx1000x1000x1000
1mm to micrometers
1000µm
1000nm to micrometers
1µm
Formula that connects
Magnification,Image size,Actual size
M=I/A
I
A M
How would you collect cheek cells?
Via a swab
Why are cells dyed underneath a microscope?
For better viewing under a microscope
If the magnification of some 3mm check cell images was x100, then what would be the actual size of the cells?
Give in apprioate units
30µm
3/100=0.03mmx1000=30µm
If a 90mm image chloroplast is actually 10µm underneath the microscope, then what is it’s magnification?
X900
90/y=0.1mm > 90/0.1=y=x900
If a 13mm image of red blood cells actual size is 7.5µm then what is the image magnification?
x1733 1/3
13/z=0.0075mm > 13/0.0075=z=1733 1/3
If 40µm ciliated epithelial cells were to be magnified by x500,what would the image size be?
20mm
40x500=20,000µm/1000=20mm
