Key Concept: Cells are the basic unit of life 3.1 Cell Theory 2.1 Atoms, Ions, and Molecules Sponge: Set up Cornell Notes on pg. 23 Topic: Cell Theory Essential Question: Describe the difference between Eukaryotic and Prokaryotic cells in a double-bubble map Describe the difference between Eukaryotic and Prokaryotic Cells in a double-bubble map Key Concept: Cells are the basic unit of life

Pg. 22 Discussion Questions (3) Eukaryotic Cell Prokaryotic Cell Prokaryotic vs. Eukaryotic Cell Double-Bubble

What do these “cells” have in common? Table Discussion: What do you think about when you hear the word “cell”? (Think of more than one type) What do these “cells” have in common?

These are some things that you may think of when you think of a cell: Cell phone jail cell monk’s cell cell They have/are: structure, small, things inside, matter, mass, made of atoms, used by humans…

KEY CONCEPT Cells are the Basic unit of life. Macrophages- play an important role in your immune system- take in a digest foreign materials (red= bacteria)

The cell theory grew out of the work of many scientists and improvements in the microscope. Many scientists contributed to the cell theory. Concluded that ALL living things are made of cells Proposed that all cells come from other cells First to identify cells and named them Made better lenses for microscopes First to note that plants are made of cells

Robert Hooke In 1665 he used the three-lens compound microscope to examine thin slices of cork He observed that cork is made of tiny, hallow compartments These compartments reminded Hooke of small rooms found in monasteries (where monks live), so he named them cells.

More was learned about cells as microscopes improved.

Cells Red blood cells cork

How does the size of a cell in a blue whale compare to the size of the cell in a tadpole?

How does the size of a cell in a blue whale compare to the size of the cell in a tadpole? A: Most cells in a whale are the same size as in a tadpole! So what makes a blue whale so much bigger? A whale has far more cells.

The Cell theory has three principles. 1. All organisms are made of cells.

2. All existing cells are produced by other living cells.

3. The cell is the most basic unit of life.

One of the 3 principles of cell theory is that ALL existing cells are produced by other existing cells. Apply this principle to a cut on your arm. (Explain what is happening throughout the healing process)

Messages are sent to skin cells to replicate Answer One of the 3 principles of cell theory is that ALL existing cells are produced by other existing cells. Apply this principle to a cut on your arm. You get a cut You start to bleed You form a scab Messages are sent to skin cells to replicate Skin cells replicate through mitosis New skin cells are created Scab falls off You are healed!

All cells share certain characteristics:

All cells share certain characteristics: Cells tend to be microscopic. Bacterium (colored SEM; magnification 8800x)

All cells share certain characteristics: Cells tend to be microscopic. All cells are enclosed by a membrane. cell membrane Bacterium (colored SEM; magnification 8800x)

All cells share certain characteristics Cells tend to be microscopic. All cells are enclosed by a membrane. All cells are filled with cytoplasm. cell membrane Bacterium (colored SEM; magnification 8800x) cytoplasm

Cytoplasm: is a jellylike substance that contains dissolved molecular building blocks- such as proteins, nucleic acids, minerals, and ions Bacterium (colored SEM; magnification 8800x)

Draw and label picture in the middle of p. 22 There are two cell types: eukaryotic cells and prokaryotic cells. Eukaryotic cells have a nucleus. The nucleus holds the DNA Have membrane-bound organelles May be multi-cellular or single-celled organisms nucleus organelles cell membrane Draw and label picture in the middle of p. 22

Organelles: structures that are specialized to perform distinct processes within a cell. The nucleus is usually the largest and most visible organelle.

Things that have Eukaryotic Cells: PLANTS ANIMALS FUNGI

Draw and label picture in the middle of p. 22 Prokaryotic cells do not have a nucleus. do not have membrane-bound organelles DNA is in the cytoplasm All are microscopic, single-celled organisms cell membrane cytoplasm Draw and label picture in the middle of p. 22

Things that have prokaryotic cells Archaea Bacteria

On the bottom of pg. 22: Draw a double-bubble map comparing and contrasting Eukaryotic and Prokaryotic cells (include mini picture)

Cells tend to be microscopic No nucleus Has a nucleus All are produced by other cells Always single celled Prokaryotic cells All cells are enclosed by a membrane Eukaryotic cells DNA in nucleus DNA in cytoplasm DNA No membrane-bound organelles Has membrane-bound organelles All cells are filled with cytoplasm.

3.1 Cell Theory Cont’ 2.1 Atoms, Ions, and Molecules Sponge: Set up Cornell Notes on pg. 25 Topic: Cell Theory Cont’ Essential Question: None  EQ: None 

Leave room for at least 5 bullets each!!!! On pg. 24: Cell Video Notes Intro to cells # 1: Intro to cells #2: Prokaryotic vs. Eukaryotic cells: Bacteria: Leave room for at least 5 bullets each!!!! The littlest Assassins: How Viruses Work:

Draw and label picture on p. 25 Viruses Virus- An infective agent that typically consists of a DNA or RNA strand in a protein coat. multiply only within the living cells of a host Antibiotics will not work on them Vaccines prevent them Protein Coat EX: Herpes virus Influenza Chickenpox Ebola virus Draw and label picture on p. 25

Movies about Viruses I am Legend 28 weeks later The Stand (book) Osmosis Jones The Happening

Classwork/Homework On the rest of pg. 25: Draw a tree map classifying Prokaryotic cells, Eukaryotic cells, and Viruses (use video/class notes) Cells Viruses Prokaryotic Eukaryotic

Draw a tree map classifying Prokaryotic cells, Eukaryotic cells, and Viruses Nucleus DNA in protein Coat No nucleus Organelles No organelles Needs a host Single-cellular Multi-cellular Antibiotics do not work on them DNA in cytoplasm And Single-cellular DNA in nucleus Vaccines prevent