introduction to cells how we study cells: *light microscope microscope *magnification *resolving...

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Introduction to CellsHow we study cells:

*Light microscope

microscope

*magnification *resolving power

*Electron microscope

Two basic types:

*Transmission (TEM) *Scanning (SEM)

How we study cells:

Cell fractionation:

A view of the cell:

1. plasma membrane

*All cells are membrane bound, possess ribosomes and contain DNA

Red blood cell

outside of cell

inside of cell

*Two categories of cells: prokaryotic eukaryotic

A view of the cell:

Ribosomes

2. All cells possess ribosomes

3. All cells contain DNA

cytoplasmcytosol

*Additional components of any cell:

Small SubunitSmall Subunit

Large SubunitLarge Subunit

*nucleoid

A view of the prokaryotic cell:

*plasma membrane

*ribosomes

*cell wall

*capsule

*pili

Kingdom Monera – archaebacteria and eubacteria

A view of the eukaryotic cell:Elaborately compartmentalized systems

*Generalized animal cell

*Generalized plant cell

A view of the eukaryotic cell:nucleus

nuclear envelope

outer membraneinner

membranenucle

ar lamin

a

pore compl

ex

chromatinnucleolus

*nuclear lamina

*nucleolus

*chromatin

A view of the eukaryotic cell:ribosomes

*free *membrane-bound

endoplasmic

reticulumfree

bound

endomembrane system

*vesicles

A view of the eukaryotic cell:endoplasmic reticulum

cisternae

cisteranl space

smooth ER

rough ER

Protein Synthesis on the Rough ER

A view of the eukaryotic cell:Golgi apparatus

*transport vesicle

transport vesicle from ER

cisternae cis face

trans face

A view of the eukaryotic cell:Lysosome

A view of the eukaryotic cell:Vacuoles

Paramecium - osmoregulation

Review: endomembrane system

A view of the eukaryotic cell:Other membranous organelles:

mitochondria and chloroplasts

*peroxisomes

Evolution of Membrane-bound Organelles

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