cells/organelles and magnification Flashcards
What are epithedial tissues
give some examples
The outer lining
columnar and squamous.
What are endothedial tissue
The inner lining
What is differentiation
the process in which cells become specialised for a particular function from stem cells
What are stem cells
Human specialised cells that are able to develop into many different cells
What are nervous tissues
Interconnected hormones
What are the differences between prokaryotic cells and eukaryotic cells
- Prokaryotic cells do not have membrane bound organelles
- prokaryotic cells are much smaller than Eukaryotic cells (-100)
- Both have ribosomes but prokaryotic cells have 70s ribosomes and eukaryotic have 80s ribosomes
What is the difference between a nucleus and a nucleoid
nucleus = is a membrane bound structure, spherically shaped
Nucleoid = is irregularly shaped, does not contain the nucleolus
Draw a eukaryotic and prokaryotic cell
Draw it
Prokaryotic cells functions
nucleoid
Plasmids
70s ribosomes
Capsule
Cell wall
Plasma membrane
Flagellum
Cytoplasm
-Nucleoid holds the DNA
-Plasmids are small loops of DNA that stores extra genetic information
-70s ribosomes are used for protein synthesis
-Capsules are the protective layer used for attachment site for exchange
-Cell wall is used for rigidity
-Plasma membrane controls what goes in and out of the cell
-flagellum assist the cell in movement
-Cytoplasm is where all the chemical reactions take place
Eukaryotic cells function
Nucleus
cytoplasm
Lysosome
Golgi apparatus
80s ribosomes
RER
nucleolus
Nuclear envelope
Plasma membrane
SER
chloroplast
Centriole (only found in animal cell)
i will finish it later
What are the 2 types of microscopes
Light and electron microscope
Describe how to use a microscope
Start with the stage up
lowest magnification
focus
move to the next magnification
focus
move to the next magnification
focus
Label a microscope
label
Advantages and disadvantages of light microscope
Where are light microscopes mainly used in?
Advantages : cheaper, looks at living samples
Disadvantages : Poor reolution and magnification
Classroooms but not for research purposes