Daily Routine Sit in your appropriate seat quietly Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

Biology Announcements Organelle 3D Group Project due October 7th

KEY CONCEPT Cells are the Basic unit of life.

I will be able to… Explain how scientific discovery developed our understanding about cells Explain the three principles of the Cell Theory Explain the similarities and differences between prokaryotes and eukaryotes

The cell theory grew out of the work of many scientists and improvements in the microscope. Many scientists contributed to the cell theory.

The cell theory grew out of the work of many scientists and improvements in the microscope. Many scientists contributed to the cell theory. 1665 – first to identify and name cells 1674 – improved microscope and describe living cells 1838 – first to note plants are made of cells 1839 – concluded all living things are made of cells 1855 – all cells come from other cells

Many scientists contributed to the cell theory. The cell theory grew out of the work of many scientists and improvements in the microscope. Many scientists contributed to the cell theory. More was learned about cells as microscopes improved.

Many scientists contributed to the cell theory. The cell theory grew out of the work of many scientists and improvements in the microscope. Many scientists contributed to the cell theory. More was learned about cells as microscopes improved. The cell theory is a unifying concept of biology.

Early studies led to the development of the cell theory. The Cell theory has three principles. All organisms are made of cells.

Early studies led to the development of the cell theory. The Cell theory has three principles. All organisms are made of cells. All existing cells are produced by other living cells.

Early studies led to the development of the cell theory. The Cell theory has three principles. All organisms are made of cells. All existing cells are produced by other living cells. The cell is the most basic unit of life.

Prokaryotic cells lack a nucleus and most internal structures of eukaryotic cells. All cells share certain characteristics.

All cells share certain characteristics. Cells tend to be microscopic. Prokaryotic cells lack a nucleus and most internal structures of eukaryotic cells. 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. Prokaryotic cells lack a nucleus and most internal structures of eukaryotic cells. 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. Prokaryotic cells lack a nucleus and most internal structures of eukaryotic cells. 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

There are two cell types: eukaryotic cells and prokaryotic cells.

There are two cell types: eukaryotic cells and prokaryotic cells. Eukaryotic cells have a nucleus. nucleus cell membrane

There are two cell types: eukaryotic cells and prokaryotic cells. Eukaryotic cells have a nucleus. Prokaryotic cells do not have membrane- bound organelles. nucleus organelles cell membrane

There are two cell types: eukaryotic cells and prokaryotic cells. Prokaryotic cells do not have a nucleus. nucleus organelles cell membrane

There are two cell types: eukaryotic cells and prokaryotic cells. Prokaryotic cells do not have a nucleus. Prokaryotic cells do not have membrane-bound organelles. nucleus organelles cell membrane cytoplasm

Daily Routine Sit in your appropriate seat quietly Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

Biology Announcements Organelle 3D Group Project due October 8th

Bell Work Compare and contrast eukaryotic and prokaryotic cells. Use your notes form last week.

KEY CONCEPT Cells are the Basic unit of life.

I will be able to… Describe the structure of a phospholipid Describe the structure of a cell membrane Explain how other materials travel from outside of a cell to inside the cell

KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment.

Cell membranes are composed of two phospholipid layers.

Cell membranes are composed of two phospholipid layers.

Cell membranes are composed of two phospholipid layers. The cell membrane is made of a phospholipid bilayer. There are other molecules embedded in the membrane. cell membrane protein cholesterol carbohydrate chain protein channel

Cell membranes are composed of two phospholipid layers. The cell membrane has two major functions. cell membrane

Cell membranes are composed of two phospholipid layers. The cell membrane has two major functions. forms a boundary between inside and outside of the cell cell membrane outside cell inside cell

Cell membranes are composed of two phospholipid layers. The cell membrane has two major functions. forms a boundary between inside and outside of the cell controls passage of materials cell membrane outside cell inside cell

Cell membranes are composed of two phospholipid layers. The fluid mosaic model describes the membrane. cell membrane protein cholesterol carbohydrate chain protein channel

Cell membranes are composed of two phospholipid layers.

Cell membranes are composed of two phospholipid layers. The cell membrane is selectively permeable. Some molecules can cross the membrane while others cannot.

Cell membranes are composed of two phospholipid layers. The cell membrane is selectively permeable. Some molecules can cross the membrane while others cannot.

Chemical signals are transmitted across the cell membrane. Receptors bind with ligands and change shape. There are two types of receptors.

Chemical signals are transmitted across the cell membrane. Receptors bind with ligands and change shape. There are two types of receptors. intracellular receptor (within the cell)

Chemical signals are transmitted across the cell membrane. Receptors bind with ligands and change shape. There are two types of receptors. intracellular receptor membrane receptor (proteins)

Spend the Rest of the period looking up the functions of the organelles for your project. Use the textbook, the computers around the room, posters, etc.

Daily Routine Sit in your appropriate seat quietly Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

Biology Announcements Organelle 3D Group Project due October 8th Bring in supplies for the Cell City Project because Tomorrow is a work day

Bell Work Describe the cell membrane. What is it made of? How do molecules enter the cell through the membrane?

KEY CONCEPT Cells are the Basic unit of life.

I will be able to…

Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Diffusion and Osmosis Passive transport does not require energy input from a cell. Molecules can move across the cell membrane through passive transport. There are two types of passive transport. Diffusion – movement of molecules from higher concentration to lower concentration

Diffusion and Osmosis Passive transport does not require energy input from a cell. Molecules can move across the cell membrane through passive transport. There are two types of passive transport. Diffusion Osmosis – movement of water from higher concentration to lower concentration through a semi-permeable membrane

3.4 Diffusion and Osmosis Diffusion and osmosis are types of passive transport. Molecules diffuse down a concentration gradient.

3.4 Diffusion and Osmosis Diffusion and osmosis are types of passive transport. There are three types of solutions. Isotonic – equal amounts of water and solute Hypertonic – more solute; less water; dehydrated/shrivel Hypotonic – more water; less solute; too filled/explode

Diffusion and Osmosis Some molecules can only diffuse through transport proteins. Some molecules cannot diffuse across the membrane. Facilitated diffusion is diffusion through transport proteins.

Spend the Rest of the period looking up the functions of the organelles for your project. Use the textbook, the computers around the room, posters, etc.

Daily Routine Sit in your appropriate seat quietly Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

Biology Announcements Organelle 3D Group Project due October 8th

Bell Work What is Diffusion? What is Osmosis?

KEY CONCEPT Cells are the Basic unit of life.

I will be able to… Model the process of diffusion in a cell

Diffusion Experiment Read over the procedure Write a hypothesis Get into groups of 4 Gather supplies Follow the procedures; remember to dap the model before massing Make observations

Daily Routine Sit in your appropriate seat quietly Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

Biology Announcements Organelle 3D Group Project due October 8th Chapter 3 Test will be on Friday, October 11th

Bell Work What is Diffusion? What is Osmosis?

Active Transport

I will be able to… Explain how active transport works Distinguish among endocytosis and exocytosis

3.5 Active Transport, Endocytosis, and Exocytosis KEY CONCEPT Cells use energy to transport materials that cannot diffuse across a membrane.

3.5 Active Transport, Endocytosis, and Exocytosis Active transport requires energy input from a cell and enables a cell to move a substance against its concentration gradient. Active transport is powered by chemical energy (ATP). Active transport occurs through transport protein pumps. Cells use active transport to maintain homeostasis.

3.5 Active Transport, Endocytosis, and Exocytosis A cell can import and export large materials or large amounts of material in vesicles during the processes of endocytosis and exocytosis. Cells use energy to transport material in vesicles. Endocytosis is the process of taking material into the cell. Phagocytosis is a type of endocytosis.

3.5 Active Transport, Endocytosis, and Exocytosis A cell can import and export large materials or large amounts of material in vesicles during the processes of endocytosis and exocytosis. Cells use energy to transport material in vesicles. Exocytosis is the process of expelling material from the cell.