WARM-UP1. Why do you think plant cells have a square-like

shape?

2. What organelle is the “brain” or the cell that contains all the genetic information?

3. What does a eukaryotic cell have that a prokaryotic cell does not?

4. What are at least 2 things a virus CANNOT do?

5. What does the mitochondria do?

COMPARING CELLS LAB

• Reminder: If you did not take the quiz on Friday, you need to come in during lunch or after school BY THE END OF THIS WEEK. You can use your foldable.

• Progress Reports are due this week. I will hand out sheets that include what assignments you are missing. Turn in your missing assignments as soon as possible. If you were not here for a lab, test, or quiz you must come in during lunch, after school or advisory to complete them.

COMPARING CELLS LAB

• Objective: SWBAT set-up wet slides of different types of cells and record their observations

• Agenda

• Go over parts of a microscope and fill in handout

• Model how to make a wet mount slide and lab directions

• Complete Lab and Lab handout

• Discuss results

• Start Cellular Transport Notes/ Work on Homework

MAKING A WET MOUNT SLIDE1. Get a clean __________ and ______________ from

your teacher.

2. Be careful with ____________________ because it can stain your clothing or irritate your skin.

3. Place _____ drops of water in the middle of the slide. If there is too much water, the coverslip will not hold the cells in place.

4. Place one _______ of the coverslip just outside the water on the slide.

5. Slowly _____________ the coverslip on top of the water.

MAKING A WET MOUNT SLIDE6. Pick up the slide with ________ _________. Place the

slide on the ___________ and view it first with the ________ objective. Once you see a general image of the cells, you can rotate the _______________ to view the slide with different objectives.

7. When you’re done viewing one slide, carefully take it off the _________ with ________ __________.

8. After viewing all of the slides, clean off both the ________________ and _________ with water and ________ them down with paper towels.

EXIT TICKET

1. What cell structures were you able to observe today?

2. Were these cells prokaryotic or eukaryotic?

3. What do plant cells look like compared to animal cells?

WARM UP

1. What cell structures were you able to observe yesterday? Use your foldable to answer.

2. Why do animal cells NOT have a chloroplast? Answer in complete sentences.

3. Which structure of the cell provides protection and controls what goes in or out of the cell?

4. What kinds of materials do you think pass through a cell? Name at least 3.

AGENDA• Reminder: You may come in to do a Quiz retake during nutrition

break, lunch, after school or advisory. I cannot go over the quizzes from last week until everyone takes it.

• Objectives:

• SWBAT describe the function of the cell membrane and define selectively permeable.

• SWBAT classify scenarios as either active or passive transport and provide an explanation.

• Notes

• Group demonstration

• Exit Ticket

• Homework: Reading Guide 3.3 and Cross Word Puzzle

WHAT IS THE CELL MEMBRANE?

• The Cell membrane is a boundary between the cell and its environment.

• It allows materials such as water, nutrients and waste products to enter and leave.

• Often called a selectively or semi permeable because it only allows certain materials in and out

SEMI-PERMEABLE

MOSAIC

WHAT IS THE CELL MEMBRANE MADE OF?

• The cell membrane is mostly made of a lipid bilayer- Lipids are typically fats, oils and waxes - Bi = two

• The “heads” are polar and will interact with water• The “tails” do not interact with water and face

each other• Proteins and Carbohydrates are also embedded

in the membrane.

CELL MEMBRANE

Hydrophobic- does not like water

Hydrophilic- likes water

CELL MEMBRANE

THE CELL MEMBRANE

• The Cell Membrane’s main function is to maintain homeostasis. So, what is homeostasis…

HOMEOSTASIS

• Homeostasis is when a living thing maintains its internal environment.

i. All livings things must be able to maintain their internal environment

• Examples:

• Sweating cools our skin

• Shivering generates heat

THE CELL MEMBRANE

• Concentration is the amount of a substance (mass) present in a given volume of a solution

• Concentration gradient: is the difference in concentration of a substance from one location to another

WHAT IS CONCENTRATION?

GROUP DEMONSTRATION

GROUP DEMONSTRATION

CELLULAR TRANSPORT

• Definition: The movement of molecules, energy and waste in or out of the cell.

• The ONLY way to get in or out is through the CELL MEMBRANE.

• The Cell membrane is SEMI-PERMEABLE, meaning that some things are allowed through and others aren’t to maintain homeostasis

• There are TWO types of transport:

• Active transport

• Passive transport

PASSIVE TRANSPORT

• Definition: The movement of substances across a biological membrane without spending chemical energy (ATP).

• Types of Passive Transport:

• Diffusion

• Osmosis

DIFFUSION:• Definition: a natural process of molecules

moving from areas of HIGH concentration to areas of LOW concentration.

• Key things to keep in mind:

• Does NOT require spending any ATP.

• Always moves from where there is MORE to where there is LESS.

DIFFUSION:

Semi-permeable membrane

OSMOSIS:• Definition: Osmosis is the diffusion of water

only.

• Things to keep in mind:

• Osmosis is the exact same thing as diffusion…only it only deals with water.

• No energy needs to be spent.

• Water always moves from where there is MORE to where there is LESS.

1. Which side in the picture below has the greatest concentration of sugar? Water?

2. In which direction will the water move? •

There are three different types of solutions…

1. Isotonic

• Means “same strength” or same concentration

2. Hypertonic

• Means “above strength” or high concentration

3. Hypotonic

• Means “below strength” or low concentration

Osmosis cont.

TYPES OF SOLUTIONS

IDENTIFY THE TYPE OF SOLUTIONA B C

WARM-UP1. Fill in the blanks: _________________ is a type of

_________ _______________ that only involves the movement of water across a cell membrane

2. Through cellular transport, what is the cell trying to achieve?

3. Movement of carbon dioxide molecules through a cell membrane from a HIGH to LOW concentration requires no energy. This is an example of….

4. What form of energy do cells use?

AGENDA• Objectives: • SWBAT differentiate between passive and active transport.

• SWBAT set up a transport lab using iodine, starch, and test tubes by following directions and safety requirements.

• Finish Cellular Transport Notes• Lab

• Go over handout

• Set-up

• Complete Day 1 questions

• Exit Ticket• Homework: Study Guide/ Reading Guide 3.4-3.5

ACTIVE TRANSPORT:

• Definition: the process that requires energy in the form of ATP to move molecules across a membrane.

• Two IMPORTANT things to know about active transport:

• ENERGY IS Needed in the form of ATP

• Molecules are moved from areas of LOW concentration to areas of HIGH concentration.

TYPES OF ACTIVE TRANSPORT:• There are THREE main types:

• Endocytosis:ENDO means internal or inside

• Exocytosis:EXO means external or outside

• Transport Protein Pumps:a. A pump is a machine that requires energy to move

materials in or out

b. Ex. Air pumps for tires and sports balls

TYPES OF ACTIVE TRANSPORT:1. Endocytosis: process of engulfing LARGE

molecules and bringing them INTO the cell.

2. Exocytosis: process of enveloping LARGE molecules and releasing them OUT of the cell.

3. Transport Protein Pump: a protein that is within the cell membrane that can open and close to shuttle molecules in or out of the cell against the concentration gradient.

WHICH TYPE IS THIS?

CELLULAR TRANSPORT CONCEPT MAP

EXIT TICKET1. A cell requires energy to move materials from an area of

low concentration, across the cell membrane, to an area of high concentration. This process is called:

2. A lipid bilayer makes up the majority of which structure?a. Cell Wallb. Cell Membranec. Cytoplasmd. Chloroplast

3. What does semi-permeable mean?

4. Sodium ions are pumped from a region of low concentration to an area of high concentration in the nerve cells of humans. What is this process called?

WARM-UP1. What does semi-permeable mean?

2. Starch molecules are pumped into a cell through proteins in the cell membrane. Energy is required. What type of transport is this?

3. Which type of transport occurred in the diagram below?

AGENDA• Reminder: Pablo, Miriam, Precilla and Alex—You

need to take the quiz! Anyone who wants to retake the quiz to get a better score must do so by Friday. All missed or late work must be turned in by Friday as well.

• Objective: SWBAT draw a conclusion about the permeability of a plastic bag and determine the type of transport that occurred.

• Finish Lab• Complete the Lab handout• Clean-up supplies

• Study Guide for Test

TYPES OF CELLS_____________________“before a nucleus”

Cell Membrane, ribosomes, nucleus, ER, Golgi apparatus, mitochondria, cytoplasm

Does NOT have a nucleus or most organelles. Has cytoplasm, DNA,, cell membrane

Ex.: _________________

___________Plant Cell

Has a nucleus with DNA, organelles, cell membrane, cytoplasm

_____________________ “true nucleus”

1. __________2. __________3. __________

Small Vacuoles, circular shape

EXIT TICKET

1. Sodium ions are pumped from a region of low concentration to an area of high concentration in the nerve cells of humans. What is this process called?

2. Plant and Animal cells are both types of ___________________ cells.

3. How do we know if a cell is prokayotic?

4. What is it called when a living thing, or cell, tries to maintain internal balance?

The diagram shows a cell placed in a solution.

1.How will osmosis affect the animal cell?

a. Water will enter the cell causing it to enlarge.

b. Water will leave the cell causing it to shrink.

c. Sugar will enter the cell causing it to enlarge.

d. Sugar will leave the cell causing it to shrink.

WARM-UP

AGENDA• Study for Test

• Vocabulary Memory Game

• Ask any remaining questions

• Turn in Study Guides and any missed or late work.

• Take Test

• Planet Earth Video (If we have time!)