N.S. 100 Lecture 4a– Cell Part 1
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N.S. 100 Lecture 4a– Cell Part 1 There are two versions of this file on my web site. It is a large file and it may be more convenient for you to view the pdf version of this file online.
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N.S. 100 Lecture 4a– Cell Part 1 There are two versions of this file on my web site. It is a large file and it may be more convenient for you to view the pdf version of this file online. CELLS ~ smallest unit of life ~ highly organized. Adult human stem cell. Protozoan cell. Algae cell. - PowerPoint PPT Presentation
Transcript of N.S. 100 Lecture 4a– Cell Part 1
N.S. 100 Lecture 4a– Cell Part 1 There are two versions of this file on my web
site. It is a large file and it may be more convenient for you to view the pdf version of
this file online.
CELLS~ smallest unit of life
~ highly organized
Adult human stem cell
http://www.petitmusee.org/images/ameba_jpg.jpg
Algae cell Protozoan cell
Protozoan cell
Algae cell
Cells come in all shapes and sizes
Blood cellsNerve cell
Bacteria cells
…….more cell shapes and sizes
Fungus infected skin cells
~ All cells are chemical factories ~
http://images.pennnet.com/gallery/cgw/0600_cancer_cells.jpg
Cancer cells = abnormal cell products
make them look and behave abnormally
Two basic types of cells:Proc(k)aryotic Cells
Lack internal membranes or compartments
Bacteria and blue green bacteria
Euc(k)aryotic Cells
Contain organelles (internal membranes & membrane bound compartments)
Animals, Plants, Fungi, and Protista
Spirals
spheres
Rods
Three prokaryotic cell shapes
~Bacteria~ example of prokaryotic
Eucaryotic cells found in: plants, fungi, protista, and animals
http://www.oup.co.uk/images/oxed/children/yoes/nature/animalcell.jpg
http://www.escellinternational.com/images/content%20images/cell1.jpg
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/01541a.jpg
Eucaryotic cells contain organelles =
internal membrane structures
“Oily” membranes surround cells and organelles
Water
Oil Drop
Organelles are like oil drops (liposomes, lipo = fat, some = body)
and they do not dissolve in water
Water
Oil
Organelles = oil drops with enzymes inside
Human cheek cells magnified 400 times
Nucleus (organelle)
NucleusEukaryotic cells
DNA called chromatin = blueprint for proteins
surrounded by nuclear envelope (membrane)
Nuclear pores
Nucleolus
Nuclear membrane with pores
DNA
Nucleolus
DNA or Chromatin -
appears as dots, but it is really a threadlike material
DNA
Chromatin
Each human cell has 9 feet of chromatin
Human brain 100 billion cells 900 billion feet of
DNA
Biology by Mader, 2001
Nuclear membrane or envelope
Nuclear membrane with protein lined pores
chromatin
Nuclear pore
Nucleolus - makes ribosomes
Nuclear membrane
Nucleolus
organelle
organelle
organelle
organelle
Plasma membrane
Cytoplasm all living material in cell minus the nucleusCytosol = cytoplasm minus organelles = fluid
Nucleus
Nucleus
Endomembrane System ~series of connected membranes ~manufacture & delivery of products
Endomembrane system
Cell product
Endomembrane System:Rough Endoplasmic Reticulum (ER) ~ ribosomes ~ ribosomes make proteins
Smooth ER ~ enzymes detoxify carcinogens, pesticides
~ lipid synthesis
Golgi Complex ~ tags proteins for delivery options
Biology by Solomon, 2002
3 parts of the Endomembrane
system
Rough Endoplasmsic Reticulum
Membranes
Ribosomes
