Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chapter 6(the tour of cell) - Coggle Diagram
Chapter 6(the tour of cell)
Types of microscopes
an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times.
Light microscope
A light (optical) microscope uses visible light and glass lenses to magnify small, thin specimens
Scanning electron(SEM)-visible light is passed
A scanning electron microscope (SEM) produces high-resolution, 3D-like images of sample surfaces by scanning a focused electron beam in a raster pattern
Transmission electron microscope (TEM)
Transmission electron microscopy (TEM) is a high-resolution imaging technique that passes a high-energy electron beam
Important parameters of microscopy
Magnification
The ratio of an objects image size to its real size
Resolution
The measure of the clarity of the image or the minimum distance, of two distinguishing points
Contrast
Visible differences in brightness between part of the sample
Organelles
The membrane enclosed structures in eukaryotic cells
Prokaryotes
*no membrane bound organelle, small, more simplistic
Eukaryotes
Has membrane bound organelles, larger, more complex
Cell fractation
Take cell apart and separates the major organelles from one another
Centifuges fractionate cells into their component parts
Basic features of all cells
Plasma membrane
Selective barrier that allow sufficient passage of oxygen, nutrients etc
Semi fluid substance called cytosol
Chromosomes
Ribosomes
Ribosomes are complexes made of ribosmal
Endomembrane system
nuclear envelope
Endoplasmic reticulum
Golgi apparatus
lysosomes
vacuoles
Plasma memorane
_Endoplasmine Retioulum
*rough-contain ribosomes - transport (vessicles)
*smooth -
lipid synthesis
detoxify toxins
Endomembrane system
* Nuclear envelope
trash can
For the cell
golgi apparatuoLysosomes
vacules O
plasma kell memorare
