Warm Up 9/16 What are the two main types of cells?
What is the main difference between them? APA Format and Rough Draft
Rough Draft of Research Plan is DUE next time. Rationale Paragraphs about the background research(previous experiments) & real world application Rationale needs APA citations:Plants grow really wellwith music (Kowalik, Vohl, Davis, & Powell, 2010). Hypothesis If, then format Procedure step by step procedure, future tense,anyone could follow! Bibliography APA format Kowalik, E., Vohl, N., Davis, J., & Powell, J. (2010).Plants dont react to music. Journal of Bad Botany,3(20), Organelle Review Complete the diagram titled organelle on the notesthat you picked up on your way into class. Label as many organelles as you can by yourself. Compare your diagram with your shoulder partner. Lets name them. Organelle Review Rough ER Smooth ER Cell Membrane Ribosome Chloroplast
Nucleus Golgi Body Mitochondria Cell Differentiation Cells structure relates to its function.
Nerve cells are long and thin to carry messagesthroughout the body. Bone cells calcify to become hard. Muscle cells have striations to contract. Blood cells are round like inner tubes. All your cells have the same DNA!How do theybecome different shapes and sizes? Cell differentiation happens through generegulation. Genes are turned on or off through chemical signals. The Cell Membrane Do Your Cells Eat and Drink?
Cells must take in waterand nutrients in order tofunction. Mmm.. The cell must take in sugars, hormones, amino acids, etc.In takes in all things necessary for cellular function.Get input from students on cell shape. Discuss the fact that cells are 3D. What part of the cell allows it to take in nutrients and water?
First ask the students if they know the answer.Click to bring in the picture of the cell membrane Cell Membrane vs Cell Wall
Flexible Found in all cells Regulates entry into thecell Made up oflipids andproteins Cell wall Not flexible Not found in all cells Provides structure andsupport Made up ofCarbohydrate andprotein fibers Of What is the Cell Membrane Made?
Proteins and Lipids and Carbohydrates Do not discuss individual proteins here.Discuss the structure of the phospholipids (head and tail).It is a fluid membrane.The proteins float through the lipids and it is not solid.It can be described as a Wall of Crisco. The Cell Membrane is a Mosaic.
Mosaic means: composed of a combinationof diverse elements How does this relate to a cell membrane? Definition from Selectively Permeable
Cell membrane will allow some substances to passthrough it. What are some objects that are permeable that youcan think of? Which color dots is the blue line going to be permeable to? What are the Proteins in the Cell Membrane?
Marker Channel Receptor The students do not need to be tested over this information!Click to bring in each name.Do one at a time so you can discuss.Receptors receive chemical information (hormones)and act like a radio antenna to send information inside the cell. Most hormones do not actually go into the cell.Channel protein bring polar compounds (ex: glucose) into the cell.The compound actually has to fit the shape of the channel.Marker proteins identify the cell.They are the name tags.They identify the cell as self, so that your body identifies your cells. The Proteins of the Cell Membrane
Receptor Proteins: receive chemical information(hormones)and act like a radio antenna to sendinformation inside the cell. Channel Proteins: bring polar or large compounds(ex: glucose) into the cell. The compound actuallyhas to fit the shape of the channel. Marker Proteins: identify the cell.They are thename tags. Functions of the Cell Membrane
Regulates what goes inand out of the cellGatekeeper Maintains homeostasis Helps with flexibility Diffusion Is a type of passive transport.
Movement of molecules from a higherconcentration to lower concentration until there isequal distribution Examples: Perfume, Air freshener, food coloring in water Equilibrium When a system has the same concentration throughout
The purpose of diffusion is to reach equilibrium!! How would diffusion happen in a cell?
Tell the kids to watch the molecules moving across the membrane.Ask why they are moving. to reach equilibrium.Notice that some molecules are disappearing (they are being used.) 18 How would diffusion happen in a cell? How would diffusion happen in a cell? How would diffusion happen in a cell? How would diffusion happen in a cell? How would diffusion happen in a cell? How would diffusion happen in a cell? How would diffusion happen in a cell? Osmosis Diffusion of water through a semi-permeable membrane
Osmosis Diffusion of water through a semi-permeablemembrane Blue dots= water Green= salt Osmosis is a type of diffusion
Ask what the Mickey Mouse molecules represent. - water(They should know this from previous powerpoints).Have the students explain to what is happening.Include movement from high to low. Cell Membrane 27 Osmosis is a type of diffusion
Cell Membrane Osmosis is a type of diffusion
Cell Membrane Osmosis is a type of diffusion
Cell Membrane Osmosis is a type of diffusion
Cell Membrane Osmosis is a type of diffusion
Cell Membrane Osmosis is a type of diffusion
Cell Membrane Osmosis is a type of diffusion
Cell Membrane Explain what is happening
This shows the movement of all different substances, which is reality.They do not take turns.Get the students to explain what is happening. 35 Explain what is happening Explain what is happening Explain what is happening Explain what is happening Explain what is happening Explain what is happening Explain what is happening What about the egg lab? What does the egg represent?
What do you think is going to happen to your eggwhen you look at it next class period? Hypertonic Solutions The solution outside the cell has a higherconcentration of solute Cell loses water and shrinks Hypotonic Solution The solution outside of the cell has a lowerconcentration of solute Cell gains water and enlarges Isotonic Solution Concentration of solute is the same inside andoutside of the cell Cell stays the same What would happen to the animal cells in each beaker?
100% Distilled Water 80% H2O 70% Water 30% Dissolved Substances 80% H2O 80% Water 20% Dissolved Substances 80% H2O Ask the students to predict what would happen to the cells in the beaker.You may want to explain solutions first.Dissolved substances would be sugars, salts, ions, etc. 47 Which way did the water move?
100% Distilled Water 80% H2O Have the students predict and then show the answer.You have to click to get the beaker and the question to show. Why did the cell get so big? 48 Which way did the water move?
80% Water 20% Dissolved Substances 80% H2O Predict and show answer. Why did the cell stay the same size? 49 Which way did the water move?
70% Water 30% Dissolved Substances 80% H2O Predict and show answer. Why did the cell get so small? 50 Which type of solution has this cell been placed in? Which type of solution has this type of cell been placed in? Which type of solution has this cell been placed in? Lets Practice Were done with the notes
So glue them into your spiral and record in yourtable of contents! Clean Up Time #1 Put team folders away
#2 Put all supplies back in team tub #3 Pick up trash on and around table #4 Put any additional supplies (books, etc) backwhere they go and cheer and encourage yourteammates.