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

2. 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

3. 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.

4. 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.

5. 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?

6. 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

7. 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)