Diffusion Osmosis Facilitated Diffusion Pumps Bulk Transport YOU

Diffusion

Osmosis

Facilitated Diffusion

Pumps

Bulk Transport

YOU NEED YOUR BOOKS!!!!

Good Morning! Warm Up Questions: You completed these on Wednesday with the sub. We will go over them today. 1. 2. 3. 4. 5. Compare and contrast passive and active transport. List the components of the cell membrane. List the types of passive transport. List the types of active transport. Describe how the structure of the cell membrane is related to its function. Today: 1. 2. 3. Complete review notes Video Class work

Good Afternoon! Warm Up: Below are three pictures of animal cells in a solution. Draw these in your notebook then label each SOLUTION as one of the following: hypertonic, hypotonic, isotonic A. _________ B. _________ C. _________

Cell Transport Passive Transport Active Transport (no energy) (energy) Facilitated Diffusion Osmosis Pumps Exocytosis Endocytosis Pinocytosis Phagocytosis

Direction Transport Mechanism Energy Required? Examples of Particles Diffusion Osmosis Facilitated Diffusion Pumps Endocytosis / Exocytosis High to Low to High N/A Pores Channels Pumps Yes No No No CO 2 H 2 O Glucose O 2 Ions Membrane Yes Food, Waste

VOCAB SOLUTE _______ = substance that is dissolved in a solvent to make a solution SOLVENT = substance in which a _______ solute is dissolved EX: Koolaid powder = solute Water = solvent Koolaid drink = solution http: //www. makash. ac. il/h_school/hstsb/chem/luach/dissolve. jpg

Images by Riedell _________ CONCENTRATION = mass of a solute in a given volume of solution MORE molecules there are in a given The _______ volume the ______the concentration GREATER

What if there is a difference in concentration but solute molecules can’t move across a membrane? WATER will move until concentration reaches equilibrium

Cell in Hypertonic Solution 15% Na. CL 85% H 2 O ENVIRONMENT CELL 5% Na. CL 95% H 2 O What is the direction of water movement? Out of the Cell

Cell in Hypotonic Solution 10% Na. CL 90% H 2 O CELL 20% Na. CL 80% H 2 O What is the direction of water movement? Into the cell

Cell in Isotonic Solution 10% Na. CL 90% H 2 O ENVIRONMENT CELL 10% Na. CL 90% H 2 O NO NET MOVEMENT What is the direction of water movement? equilibrium The cell is at ________.

Isotonic Solution NO NET MOVEMENT OF H 2 O (equal amounts entering & leaving) Hypotonic Solution Cell Swells & may burst Hypertonic Solution Cell shrivels up

Animal cells http: //www. stchs. org/science/courses/sbioa/metenergy/bloodcells. gif

Animation

Osmosis in Red Blood Cells Isotonic Hypertonic

hypotonic hypertonic isotonic hypotonic

Plasmolysis Lab

16. List the term that refers to a plant cell in a hypertonic solution that has lost water, resulting in the cell membrane shrinking away from the cell wall.

Warm Up Please write the following questions in your notebook. 1. Some peeled pieces of apple were placed in distilled water and some in very salty water. What will the cells in the apple pieces do in these two solutions? 2. What happens to plant cells when they are in hypertonic solutions? 3. Why do you get thirsty when you eat salty potato chips?

Name the solution (hypotonic, hypertonic, isotonic) 16. . 18. 17. 19. 20. Define crenation.

Active Transport Moving molecules across the cell membrane from LOW to HIGH concentration.

Endocytosis and Exocytosis 1. 2. 3. 4. Large food particles are engulfed by a cell. A vesicle forms around the food. The vesicle fuses with a lysosome which digests the food. Waste products are excreted when the vesicle fuses with the cell membrane.

Phagocytosis vs. Pinocytosis 1. Phagocytosis- engulfing LARGE particles 2. Pinocytosis- engulfing small particles and water, “cell drinking”

Osmosis of Water through a Cell Membrane Draw a visual representation of the effect on a cell placed in a hypertonic, hypotonic, and isotonic solution.

th 5 Period • You will need all of your Cell notes!

Good Afternoon! Warm Up: Below are three pictures of animal cells in a solution. Draw these in your notebook then label each SOLUTION as one of the following: hypertonic, hypotonic, isotonic A. _________ B. _________ C. _________

Isotonic Solution NO NET MOVEMENT OF H 2 O (equal amounts entering & leaving) Hypotonic Solution Cell Swells & may burst Hypertonic Solution Cell shrivels up

Endocytosis and Exocytosis 1. 2. 3. 4. Large food particles are engulfed by a cell. A vesicle forms around the food. The vesicle fuses with a lysosome which digests the food. Waste products are excreted when the vesicle fuses with the cell membrane.

Phagocytosis vs. Pinocytosis 1. Phagocytosis- engulfing LARGE particles 2. Pinocytosis- engulfing small particles and water, “cell drinking”

Cell Wall and vacuole are very important! Plant Cells

Osmosis in Plant Cells What makes Plant cells different from Animal Cells? 1. Chloroplasts 2. Large Vacuole (to store water) 3. Cell Wall (protection from environment) What happens to plant cells in different solutions? – – – Isotonic- no change in the cell Hypotonic- water is collected in the vacuole (creates TURGOR Pressure) **DOES NOT BURST Hypertonic- cell membrane detaches from the cell wall as water leaves the cell

Turgor Plasmolysis Turgor Pressure • The pressure exerted on the cell wall from water collected in the vacuole • Occurs in hypotonic environments http: //sun. menloschool. org/~dspence/biology/chapt er 6/chapt 6_10. html

Monday • QUIZ – Notes, homework sheet, review sheet

Can you see plant cells gaining or losing water under a microscope? Let’s take a look!

Let’s Review! Animal Plant Isotonic Hypertonic http: //faculty. northseattle. edu/esmith/012004. htm#slide 0103. htm

Is the cell membrane of an animal cell and a plant cell permeable to every molecule?

Diffusion in Action www. biologyjunction. com

Test Review! 1. Distinguish between the two types of cells. 2. What type of cell are bacteria? 3. Describe the function of the following organelles: – Ribosomes – Golgi Bodies – Endoplasmic Reticulum – Nucleus – Cytoskeleton 4. Why is the cell membrane said to be semi-permeable? 5. List the three types of passive transport as well as active transport. 6. Molecules move from areas of _____ concentration to _____ concentration. 7. Glucose moves through the cell membrane through what type of transport?

1. 2. 3. 4.

Cell Transport Test Part A Plasmolysis- fancy word for the plant cell losing water