Tuesday, February 14, 2012Homework:

•QUIZ BLOCK DAY

•WORD WALL SHEET DUE BLOCK DAY

•All makeup work should be completed during tutorial today. No makeups after chapter quiz…

What does this have to do with Biology?

Recap of Sally Snowboarder’s Cellular Transport

• Oxygen Transport: Simple Diffusion

• Carbon Dioxide Transport: Simple Diffusion

• Glucose Transport: Facilitated Diffusion

• Amino Acid Transport: Active Transport

Simple diffusion

OXYGEN TRANSPORT CARBON DIOXIDE

TRANSPORT

Facilitated diffusion

Carrier protein

GLUCOSE TRANSPORT

ATP

• MAKE A LOGBOOK ENTRY-

Entry9: Cell Transport Quiz Practice- 2/14/12

• Without looking at your logbook/notes—

Tell me what this quiz will be about.

• What are at least two big questions that you feel sure you will be asked?

For each of the entries you just listed– Determine what the main idea(s) are:What was the point of the activity/lab/discussion and what did we learn?

• EGG DEMO—

• WATER ACROSS A MEMBRANE LAB—

• DIFFUSION-OSMOSIS—

• MEMBRANE STRUCTURE—

• SALLY SNOWBOARDER—

SALT/SOLUTE CONCENTRATION IS VERY IMPORTANT BECAUSE A CELL GAINS OR LOSES WATER BASED ON THE INTERNAL/EXTERNAL SALT CONCENTRATION. EXCESSIVE WATER LOSS CAN CAUSE THE CELL TO SHRINK AND DIE. EXCESSIVE WATER GAIN CAUSES THE CELL TO SWELL AND BURST

Corn syrup (Karo light) Egg whitesWater

More concentrated solution OUTSIDE cell

Less concentrated solution inside cell

More concentrated solution INSIDE cell

Less concentrated solution outside cell

Same concentration inside and outside of

cell

(CONTROL)

OVERALL WATER MOVED OUT/EGG LOST

MASS

OVERALL WATER MOVED IN/EGG GAINED

MASS

WATER MOVED IN AND OUT/MASS STAYED ABOUT

THE SAME

Question: 1a

More concentrated solution OUTSIDE

tubeLess concentrated solution inside cell

More concentrated solution INSIDE tube

Less concentrated solution outside tube

OVERALL WATER MOVED

OUT/TUBE LOST MASS

OVERALL WATER MOVED

IN/TUBE GAINED MASS

WATER IN TUBE

SUGAR SOLUTION IN BEAKER

W

S

S

W

SUGAR SOLUTION IN TUBE

WATER IN BEAKER

Question: 1a

Plain water in cell beginning mass 7.6 g

Plain water in cell ending mass 4.3 g

Water moved out of the cell into the beaker

Sugar water in beaker

Question: 1a

Sugar water in cell beginning mass 5.2g

Plain water in beaker

Water moved from the beaker into the cell

Sugar water in cell ending mass 8.1g

Question: 1a

EXPLAIN OsmosisTwo factors cause osmosis:1. A semipermeable membrane allows water

molecules to move back and forth through the membrane, but not solute molecules

2. Water molecules “stick” temporarily to any dissolved solute molecules.

As a result, water molecules spend more time and accumulate on the side of the membrane with the higher concentration of dissolved solutes.

Question: 1b

2a. Movement of molecules through membranes made only of

phospholipids (phospholipid bilayer)Molecule

nameSize

(large or small)

Electric charge

(nonpolar, polar charge, or strong charge)

Able to cross lipid bilayer membranes between phospholipid molecules?

(Yes or No)

CO2(carbon dioxide)

Small Nonpolar YESO2 Small Nonpolar YESH2O Small Polar YESglucose Large Polar NOIon Small Strong

chargeNO

WATER– THE SOLVENT—THE THING THAT DISSOLVES THE SOLUTE

STARCH– THE SOLUTE—THE THING THAT GETS DISSOLVED IN WATER (SOLVENT)

2b

Iodine in cell

Starch in beaker

Location of color change shows that only iodine crossed

Question: 2b

IODINE (SMALL MOLECULE) INSIDE

STARCH (LARGE MOLECULE)

OUTSIDECOLOR

CHANGE OBSERVED IN

BEAKER

COLOR CHANGED

OBSERVED IN TUBE

Iodine Starch

Starch Iodine

STARCH (LARGE MOLECULE) INSIDE

IODINE (SMALL MOLECULE)

OUTSIDE

Question: 2b

DIFFUSION IS THE RANDOM MOVEMENT OF PARTICLES FROM HIGH TO LOW CONCENTRATION

Question: 3

.4. OSMOSIS HAPPENS BECAUSE THE SEMIPERMEABLE MEMBRANE ALLOWS WATER TO CROSS-BUT NOT THE SOLUTE AND ATTRACTION BETWEEN THE SOLUTE AND WATER HOLD IT ON THAT SIDE LONGER—CAUSING WATER TO BUILD UP ON THE SIDE WITH THE HIGHEST CONCENTRATION

5. CONCENTRATION STOPS CHANGING/THE MOLECULES HAVE EVENLY DISTRIBUTED—BUT THAT THEY CONTINUE MOVING RANDOMLY AROUND THE CONTAINER—MOLECULES NEVER STOP MOVING

SOLUTION IS HYPOTONIC TO CELL. MORE WATER MOVES IN

6a.

SOLUTION IS HYPERTONIC TO CELL. MORE WATER MOVES OUT

Question: 6b

SOLUTION AND CELL ARE ISOTONIC. WATER MOVES IN AND OUT EQUALLY

6c.

CELL IS IN A HYPOTONIC SOLUTION

(CELL IS HYPERTONIC)

CELL IS IN A HYPERTONIC SOLUTION

(CELL IS HYPOTONIC)

CELL IS IN AN ISOTONIC SOLUTION

6.

Water molecules

Water

Polar head faces out towards water because of the attraction

Nonpolar tails face inward so they are protected from water

Cell membrane structure

Passive transport

Simple diffusion Facilitated diffusion

Carrier protein

Co

ncen

tration

Grad

ient

CO2

SMALL, UNCHARGED MOLECULES MOVE THIS WAY

GLUCOSE

LARGER, UNCHARGED MOLECULES MOVE THIS WAY

Question: 7a Question: 7b

Active transport

Carrier protein

Co

nce

ntr

atio

n G

rad

ien

t

Calcium ion (Ca+)

LARGE OR CHARGED MOLECULES MOVE THIS WAY

MOVEMENT IS LOW TO HIGH CONCENTRATION

THIS PROCESS REQUIRES ENERGY (ATP)

ATP

Question: 7c

SIMPLE DIFFUSION

FACILITATED DIFFUSION

ACTIVE TRANSPORT

HIGH TO LOW CONCENTRATION

(MORE TO LESS)

SMALL, UNCHARGED MOLECULES

DIRECTLY ACROSS THE MEMBRANE BILAYER

NO ENERGY REQUIRED

PASSIVE

HIGH TO LOW CONCENTRATION

(MORE TO LESS)

BIG/LARGE, UNCHARGED MOLECULES

REQUIRES A PROTEIN CHANNEL/CARRIER

NO ENERGY REQUIRED

PASSIVE

LOW TO HIGH CONCENTRATION

(LESS TO MORE)

BIG/LARGE, CHARGED MOLECULES

REQUIRES A PROTEIN CHANNEL/CARRIER

ENERGY REQUIRED

ACTIVE

• Question: 8