Microscopy Flashcards
What is the magnification equation?
Eyepiece lens x objective lens = total magnification
What are the 2 focus lenses?
- Coarse focus
2. Fine focus
How do you work a microscope?
- Move the stage to the lowest position
- Place the object you want to observe on the stage
- Put the objective lens on the lowest magnification
- Turn the coarse focus knob until you see the object
- Focus your object with the fine focus
- Keep increasing you magnification using these steps
What defines a plant cell?
- Vacuole
- Cell wall
- Chloroplasts
What does the nucleus do?
Controls the cell and it’s genetic material
What does cytoplasm do?
A jelly like substance where chemical reactions happen
What does the cell membrane do?
It controls what comes in and out of the cell
What does mitochondria do?
This is where respiration happens which transfers energy
What does the cell wall do?
This strengthens and supports the cell, It is made of as tough fibre called cellulose this the cell wall very rigid and ideal for keeping the cells shape.
What does the vacuole do?
It contains a watery substance called sap which helps keep the cell firm.
What do the chloroplasts do?
This were photosynthesis occurs which happens when chlorophyll is transferred energy from the sun
Which of these cells contain chloroplasts?
Root hair cell or leaf cell?
Leaf cell
Why are nerve cells specialised?
They are long, thin and able to join to each other
Why are red blood cells specialised?
They have a red pigment which joins to oxygen, they are disk/biconcave in shape allowing for more oxygen storage and they don’t have a neucleus
Why are sperm cells specialised?
They have a tail and a very streamlined head this allows it to move through liquid and the head bury’s into an egg cell
