Please take out your homework.

Slides:

Advertisements

Similar presentations

Osmosis Osmosis is the net movement of water molecules over a partially permeable membrane from an area of less osmotic potential to an area of more negative.

Advertisements

Transport of Molecules and Homeostasis

* Water Concentrations * Movement of water molecules (H20) across a permeable membrane. * Molecules move from area of high concentrations to areas of.

Hypotonic, Hypertonic and Isotonic

Diffusion & Osmosis October 24, 2007 Ms. Manaktola.

Turgor Pressure Lab.

Osmosis Problem Practice

Hypertonic Concentration with higher solute concentration and less water concentration Hypotonic lower solute concentration and more water concentration.

1 2 Homeostasis 3 Osmosis 4 Facilitated Diffusion.

Do Now 10/27/2011 EXTRA CREDIT DO NOW: The cells of plant seeds store oils in the form of droplets enclosed by membranes. These membranes are very different.

Homeostasis and Transport: Jeopardy Review Game $2 $3 $4 $1 $2 $3 $4 $5 $1 $2 $3 $4 $1 $2 $3 $4 $1 $2 $1 Homeo- stasis Passive Transport Active Transport.

OSMOSIS and DIFFUSION.

DIFFUSION. IS THE RANDOM MOVEMENT OF MOLECULES THERE IS A NET MOVEMENT OF MOLECULES FROM AREAS OF HIGH CONCENTRATION TO AREAS OF LOW CONCENTRATION.

Diffusion – The movement of molecules in and out of cells.

DIFFUSION & OSMOSIS.

Practicing osmosis 1. Draw each beaker as you go on a separate piece of paper. 2. Draw an arrows to show which way the water would move by osmosis 3. Fill.

Osmosis Foldable The Effect of Osmosis in Cells Select 3 colors for the following terms: Hypertonic Isotonic Hypotonic.

Cellular Transport Test Review. What does this picture represent??

OSMOSIS & TONICITY SEC 4.3 PG OSMOSIS: -a special case of diffusion involving water -water molecules move across a selectively permeable.

Membrane transport Review.

Osmosis Review. 1. Hypertonic solutions Plant cells  the central vacuole loses water and the cells shrink causing wilting. Animal cells  shrink (plasmolysis)

Copy and answer the following EQ into your science journal.

Do Now 1. What maintains homeostasis for cells?  THE CELL MEMBRANE 2.What is the term that means when the organelle from #1 only lets certain things in.

OSMOSIS and DIFFUSION. Molecules are always moving Molecules move randomly and bump into each other and other barriers.

How will the water move? Osmosis Review Biology 11 Ms. Lowrie.

Cell Membranes & transport of molecules through it

Passive Transport transport of molecules across the cell membrane that does not require energy! 3 Types: 3 Types: 1) Diffusion 2) Osmosis 3) Facilitated.

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

You should be able to: Define osmosis & diffusion. Determine why do we need to regulate osmosis. Identify what controls osmosis. Distinguish between a.

Do you want me to diffuse?. TONICITY- REVIEW FROM LAST CLASS, PG Tonicity refers to the strength of solution in relationship to osmosis. 3 terms.

Osmosis: the diffusion of water molecules through a selectively permeable membrane. Water moves from high to low concentration. Is the membrane permeable.

Cell Transport. Diffusion The cytoplasm is a “solution” of many substances in water. Concentration=mass/volume Diffusion is the process by which molecules.

Elodea cells normally contain about 1% salt and 99% water. Tap water normally contains about 1% salt and 99% water. The salt solution you used contains.

Osmosis is the movement of water across a membrane from a region of high concentration to a region of low concentration. 20 % salt solution 5% salt solution.

Section 3.4 DIFFUSION AND OSMOSIS. I. Diffusion and osmosis are types of passive transport A. Passive Transport  the movement of molecules across a cell.

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

Hemolysis Naseem AL-Mthray. Hemolysis Hemolysis is the breakage of the red blood cell’s (RBC’s) membrane, causing the release of the hemoglobin and other.

Diffusion & Osmosis Lab

Do Now 11/18 Do Now: We have already seen that a high school education can be worth $120,000 or more. What do you think a 4-year college degree is worth.

Osmosis Practice. 1. Environment _____________________ hypertonic Water leaves the cell and it shrivels or shrinks.

1 This is Jeopardy Cell Transport 2 Category No. 1 Category No. 2 Category No. 3 Category No. 4 Category No Final Jeopardy.

Osmosis Challenge.

Osmosis, Diffusion, Active Transport

Passive Transport: Diffusion & Osmosis 3.4

Types of solutions.

Do Now 11/7 OBJECTIVES: 1. define osmosis, diffusion, facilitated diffusion, passive transport, concentration gradient, equilibrium, and dynamic equilibrium.

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

Diffusion Movement of molecules from an area of high concentration to an area of lower concentration (down a concentration gradient). Continues until equilibrium.

Plant Cell Osmosis Lab Mrs. Stewart Biology.

Osmosis & Tonicity This is going to show how cells transport substances in and out. 1.

Diffusion vs. Osmosis.

How Cells Deal with Osmosis

Osmosis Osmosis is the net movement of water molecules over a partially permeable membrane from an area of less osmotic potential to an area of more negative.

Plant Cell Osmosis Lab Mrs. Stewart Biology.

CELL TRANSPORT Cell membrane is semipermeable- allows certain things in, keeps certain things out Some molecules can pass right through small spaces in.

Cell Membrane Function- Protection & Controls what enters and leaves the cell Structure- Double layered Phospholipid membrane Selectively Permeable.

First Five Silently in your notebooks, draw a low powered and high powered image using your drawing guidelines.

Diffusion! Hot Water Cold Water.

CELLS Tonicity.

Osmosis Practice Problems

1. Cell _______________________ Environment _____________________.

Osmosis in Plant Cells In a weak solution, water will enter the cell and fill the vacuole. The cell membrane will push against the cell wall.

Tonicity and Solutions

Presentation transcript:

Please take out your homework. draw a picture of a water molecule. Label the positive and negative parts.

Osmosis

Effects of Osmosis can be serious for a cell! Hypotonic Hypertonic Isotonic No net change Water out Of cell Water into cell

Hypo Hypo Hippo

How cells cope

Osmosis & Plants

Plant Cells & Osmosis Plasmolysis

Hypotonic environment Causes turgor pressure. Plant is healthy. Hypertonic environment Causes wilting. Plant is unhealthy. Plasmolysis

One Last Time

Osmosis Reading “Osmosis” pp. 96-99. Answer # 2 & 3 p. 100.

The Potatoes! Each potato slice will go into a different solution The first will go into a beaker of pure water The second will go into a beaker of water and salt (lots of solute) Predict what will happen to each slice as it soaks in its solution. Make sure you: Predict if each slice will gain water, lose water, or be unaffected Identify the solutions as hypotonic, isotonic, or hypertonic