4 - Chapter 4 Cell Theory o Cell structure Membrane,...

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Chapter 4 Cell Theory o Cell structure Membrane, nucleus, endoplasmic reticulum, ribosomes, golgi, mitochondria, lysosomes o I. All living material is made of cells (Schleiden and Schwann: 1800s) o II. Living cells arise from pre-existing cells (Virchow 1858) Biogenesis vs. spontaneous generation Membrane: Danielli’s unit membrane hypothesis o 1) Lipid layer o 2) Pores = Seive Theory o 3) Various ions pass with differential ease: Charge o 4) Different properties include wettablitily = Protein layer Fluid Mosaic Model Unit Membrane hypothesis: Danielli o Model? A way of advancing science o Graduate student saying this is how it is Two Major Cell Types Prokaryotes (karyon=nucleus) o Cells that do not have a nucleus o No membrane bound organelles o Archae Live in extreme conditions o Bacteria Often vertebrate pathogens o Most have a cell wall outside plasma membrane, and many have a thick, jellylike capsule around the wall o Many have flagellum
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This note was uploaded on 03/26/2008 for the course BIOL 101 taught by Professor Hogan during the Spring '08 term at UNC.

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4 - Chapter 4 Cell Theory o Cell structure Membrane,...

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