The Discovery of The Discovery of CellsCells

The Discovery of The Discovery of CellsCells

7.17.1

I. The Cell Theory

A. ____- The basic unit of living organisms

B. The ______ was developed by several scientists including Hooke, Schleiden andSchwann.

I. The Cell Theory

C. 3 Main Ideas1. All _______ are composed of one or more cells. 2. The cell is the basic unit of structure and _________ of organisms.3. All cells come from _________ cells

II. Role of the Microscope

A. Before microscopes, we didn’t know cells existed1. People thought illness caused by bacteria were brought by _______

II. Role of the Microscope

B. 1st (Simple) Microscope 1. 1600’s 2. Leeuwenhoek 3. Used __ reading lenses and light to view objects

II. Role of the Microscope

C. Compound Microscope 1. 1600’s 2. _______ observed and named “cells”3. Uses ______ lenses and light to magnify objects up to 1500 x4. Lead to the cell theory

II. Role of the Microscope

D. Microscope practice1. Observe cork2. Observe ________ slides

II. Role of the Microscope

E. Electron Microscope1. 1930’s 2. Uses an ________ beam instead of light3. Magnifies up to _______ x

II. Role of the Microscope

4. Types of electron microscopesa. ____- Makes a 3-D image of the cell surfaceb. ____- Magnifies structures inside the cellc. ____- Creates computer images of atoms on a molecule

III. Basic Cell Types

A. _______- Small, specialized structures in a cell1. A.K.A. CELL PARTS2. Surrounded by ________

III. Basic Cell Types

B. Prokaryotes (hint: pro means NO)

1. No membrane bound organelles2. No _______3. No more than one cell (Single-celled organisms)4. No organization

III. Basic Cell Types

C. _____________1. DOES have membrane-bound organelles2. DOES have a nucleus3. Single-celled or multi-celled organisms4. Think of these as being more complex/organized

IV. Recap What are the 3 main ideas

of the cell theory? What is the difference

between a simple, compound and electron microscopes?

What is the difference between a prokaryote and a eukaryote?