Items due this week:

Friday of last week: CH 5 QuestionsToday: Radish seed labTuesday: origins of life notes (today)Wednesday: reading notes unit 2 (CH 2,

3, 4,)

Wednesday/Thursday: Unit 2 TEST!Friday: Cell Factory

Lipid Membrane, Diffusion, and

OsmosisUnit 3 Flow

Reading Notes

Complete reading notes for CH 6, 7, 8, 25.1 and 25.3

Test is scheduled for 10/21 and 10/22 Reading notes are due on that day.

Day 1 Cell Factory Assignment

Complete the cell factory analogy to remember the cell organelle parts.

Or complete cell parts

Handout using 3 cell ppts

Day 2 Origins of life and cells powerpoint

Take notes! Worth points

Day 3 – Coacervates Lab – Guided Activity Read the Background information and answer

the two pre-lab questions Perform the Guided Activity (page 2, front and

back)Make sure you “measure” the coacervates you

created.Make sure you note the magnification you are

using Start the Inquiry Activity Part A

What will you vary to see if coacervates still form? Base? More Acid? Surface Tension? Salt content?

Day 4 – Coacervates Lab - Inquiry

Complete the “Inquiry” portion of the lab, Part B.

Complete all sections of the lab. Due Monday 10/6

Day 5 – Coacervates Lab - Shareout

Briefly present to the class what you did for your inquiry and what results you had.

Day 6 – Notes!

Take Cornell notes on the

ppt: Cell Membrane and

Diffusion

HMWK: Read through Chapter 7 in your text book. Write a paragraph explaining how the process of diffusion works. Describe some biological processes for which diffusion is a necessary phenomenon. To which of the 4 Big Ideas (Google Search “4 Big Ideas AP Bio”) does the process of diffusion relate. Finally create an illustration that explains diffusion

Day 7 – Finish Notes!

HMWK: Watch the Bozeman AP Biology lab video on diffusion:

http://www.bozemanscience.com/ap-bio-lab-1-diffusion-osmosis

Complete a 3-2-1 on the video3 items you learned from the video2 questions you have1 thing that you don’t understand

Day 8 – AP Labs Diffusion and Osmosis Day AIn this experiment, you will create models of living cells using dialysis tubing. Like cell membranes, dialysis tubing is made from a material that is selectively permeable to water and some solutes. You will fill your model

cells with different solutions

and determine where/if

diffusion occurred.

Day 9 – Discussion of Day A

Record your results from yesterday’s lab Answer all questions. Handout due today! Clean up:

Throw away your “cells” Rinse all beakers thoroughly and set on tray to

dry

Day 10 – AP Labs Diffusion and Osmosis Day BIn this experiment, you will create models of living cells using dialysis tubing. Like cell membranes, dialysis tubing is made from a material that is selectively permeable to water and some solutes. You will create two cells, one filled the opposite of the other Cell #1 Inside: sugar Outside:

water

Cell #2 Inside: water Outside: sugar

The cells will sit overnight and you will use mass to determine if OSMOSIS has occurred.

Day 11 – Discussion of Day B

Record your results from yesterday’s lab Answer all questions. Handout due today! Clean up:

Throw away your “cells” Rinse all beakers thoroughly and set on tray to

dry

Day 12 – AP Labs Diffusion and Osmosis Day C

Use the computer and internet to complete Day C. Links are on my website

Review of terms:

http://www.youtube.com/watch?v=s3tEgNPox3g Plasmolysis in red onion cell-with explanation

http://www.youtube.com/watch?v=Sw87Q53NZLI Plasmolysis in elodea cell-no explanation

http://www.youtube.com/watch?v=SooSsKkJo1o

Water Potential – aka “Osmotic Pressure” The tendency of water to leave one place in favor of another place.

Water ALWAYS moves from an area of higher water potential to an area of lower water potential.

In animals….water moves into or out of a cell depends on solute concentration on either side of the cell membrane ( cells lyse or shrink)

In plants…..Affected by two factors because of cell wall:

Pressure exerted by cell wall on cell membrane (think balloon trapped in a box)

Amount of solute (ions)

Formula for water potential is:

Day 13

In plants, pressure exerted by the rigid cell wall that limits further water uptake (also known as TURGOR PRESSURE)

Pure water has solute potential of ZERO. As solute is added, the value for solute potential becomes more negative. This causes the water potential to decrease also.

As solute is added, the water potential of a solution drops, and water will tend to move into the solution.

In the laboratory, we use “bars” as the unit of measure for water potential.

1 bar = approximately 1 atm

Examples: Cell in distilled water.

Water potential outside = 0

Water potential inside = (-) since cells contain solutes

which have a negative solute potential

Water will move into the cell since inside cell is more negative

Over time, the inflow of water into the cell causes pressure to build (positive turgor or pressure) which will eventually override the negative from the solute potential. Eventually the water potential inside and outside the cell will

equal each other and net water movement ceases

Note, I said “net” water movement. Equilibrium still means movement is occurring. It just means the water going in equals the water moving out of the cell

Day 13 (cont’d) – AP Lab Diffusion and Osmosis Day DDesign an experiment to identify the Molar (M) concentrations of

the sucrose solutions and use the solutions to determine the water

potential of the plant tissue.

Day 13 (cont’d) – AP Lab Diffusion and Osmosis Day DProcedures:1. Cut four (4) potato cubes (DO NOT include skin).

2. Mass your four cubes (1 set) for Initial weight.

3. Place cubes in cups with sucrose solution molarity. Label cups

4. Make observations and place cups in order of Molarity.

5. Let it stand overnight (24hrs)

6. Mass your four cubes for Final weight. Calculate % change in mass.

7. Construct a Graph with class data

Day 14 – AP Labs Diffusion and Osmosis Day D

Perform your lab

Answer all questions

Due 10/21

Day 15 – AP Lab Diffusion and Osmosis Day D…results

Record your lab results Answer all parts of the lab Due 10/21 Clean up:

Throw away potato pieces (not in sink!!!!)Rinse all beakers thoroughly and set to dry on

tray

Write a paragraph to answer the following:

Why are cells so small? And why do they have cell membranes with so many convolutions?

Day 16 – Enzyme notes

CH 8 – Enzymes

Take notes on the powerpoint. Will be worth points

Day 16 – Enzyme lab

Catalase

Day 5 – Internet Search Research information about cell membranes

(aka the lipid bilayer). This is a “fact-finding mission”. Your quest is to discover and document information (research, structure, function, et…anything related to the cell membrane) about the cell membrane.

You will compile your findings (from today’s research) along with important websites – on a piece of binder paper (with a title).

HMWK: make a summary of your findings (from today’s research) that you will turn in 10/7/14.

Day 4 – cell membrane research shareout After each person shares what they learned

about the cell membrane, fill in the following chart:Presenter I learned: I am unclear on: