Introducing the Disease Unit:

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Presentation transcript:

Introducing the Disease Unit: Cell theory & cell structure Pathogens Immune system & vaccines Osmosis Genetics & cell division Epidemiology & the scientific method

Biology Book section 5-1 and 5-2 Homework (due Wednesday – 20 points) Read sections 5-1 and 5-2 (pages 87-93) For section 5-1 make a list of discoveries, names & dates What is “cell theory”? For section 5-2, make ~ ½ page of notes summarizing what it says Both sections CORNELL FORMAT

Section 5-1 Cell Theory Anton van Leeuwenhoek (1600’s) – microscopic life in a drop of water Robert Hooke – wood, stems, cork has “cells” Robert Brown (1833) cells have nucleus Matthias Schleiden – ALL plants made of cells Theodor Schwann – animals have cells too Rudolph Virchow – cells come from other cells CELL THEORY: all life = cells all cells from other cells.

Section 5-2 Cell structure Egg yolk = one single cell 1. MEMBRANE = outside = lipid bilayer with channels & pumps. Plants have cell wall also. NUCLEUS = center. Prokaryotes (bacteria) don’t have one. Eukaryotes do. Contains DNA in chromosomes. Nuclear envelope Nucleolus makes ribosomes 3. CYTOPLASM contains everything else.

Biology Book section 5-3 Homework (due friday – 15 points) Read section 5-3 (pages 94-98) Make a list of the Cell’s organelles: name of organelle what it does in the cell found in plant cells, animal cells, or both?

Section 5-3 organelles Mitochondria: burn food for energy (animals & plants) (Chloroplasts): sunlight  chemical energy (just plants) Ribosomes: make proteins (both animals & plants) Endoplasmic reticulum: transports new proteins (both) Golgi apparatus: modifies, packages & sends (both) Lysosomes: digests wastes (animals) (Vacuoles): store water, starch (just plants) Cytoskeleton: structural framework

From 5-2 You already knew… Nucleus: stores & copies DNA on chromosomes (both) Chromosomes: “spools” for DNA in nucleus (both) DNA: recipes for proteins (both) Nucleolus: makes ribosomes (both –in nucleus) Cell membrane: lets things in & out of cell (both) (Cell wall): rigid outside structure (just plants) Cytoplasm: liquid outside nucleus & inside membrane (both)

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