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Review of Cell Topic - Coggle Diagram
Review of Cell Topic
Calculating Magnification
Magnification = Image size / Actual size
Key conversions
1000nm = 1μm
1000μm = 1mm
1000mm = 1m
Magnification
how large the image is compared to real life
Resolution
the amount of information that can be seen in the image
Gram staining
Gram +ive
Thick cell wall of peptidoglycan
purple crystal-violet
Stains purple
One lipid
Gram -ive
Thin cell wall/membrane of peptidoglycan
pink safranin
stains pink
two lipid
Technique
Application of Crystal Violet
Application of Iodine
Alcohol wash (Ethanol)
Application of Safainin (Counter stain)
The Action Potential
The process
change in polarity
Na+ channels open
Na+ to flood into the cell
neuron to become positively charged
(+30 mV)
positively charged neuron is considered depolarised
movement of an impulse across a neuron
The Synapse
The junction between neurones and the next cell - synapse
the process
1) Action potential reaches axon terminal - depolarize membrane
2)Voltage-gated Ca2+ open and flow in
3) Ca2+ influx triggers synaptic Vessels to release neurotransmitter
4) neurotransmitter binds to receptors on target cell
which causes a postive flow of ions
Eukaryotic cells
Complex cell structure
multi-cellular organisms
nucleus
have membrane bound organelles
Fungi
plante
Prokaryotic cells
Simple structures
Single celled organisms
no membrane bound organelles
no nucleus
bacteria
kingdom - Prokaryotae
