Download QuizReview - bellevuebiology

Tuesday, February 14, 2012
Homework:
• 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
OXYGEN
TRANSPORT
Simple diffusion
CARBON DIOXIDE
TRANSPORT
Facilitated diffusion
GLUCOSE
TRANSPORT
Carrier protein
ATP
• MAKE A LOGBOOK ENTRYEntry9: Cell Transport Quiz Practice2/14/12
• 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)
Question: 1a
Water
Egg whites
More concentrated
solution OUTSIDE cell
More concentrated
solution INSIDE cell
Same concentration
inside and outside of
cell
Less concentrated
solution inside cell
Less concentrated
solution outside 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
WATER IN
TUBE
Question: 1a
SUGAR
SOLUTION IN
BEAKER
SUGAR
SOLUTION IN
TUBE
WATER IN
BEAKER
W
S
S
W
More concentrated
solution OUTSIDE
tube
Less concentrated
solution inside cell
OVERALL
WATER MOVED
OUT/TUBE
LOST MASS
More concentrated
solution INSIDE tube
Less concentrated
solution outside tube
OVERALL
WATER MOVED
IN/TUBE
GAINED MASS
Question: 1a
Sugar water in
beaker
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
Question: 1a
Plain water
in beaker
Sugar water in
cell beginning
mass 5.2g
Sugar water
in cell
ending
mass 8.1g
Water moved from the beaker into the cell
Question: 1b
EXPLAIN Osmosis
Two 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.
2a. Movement of molecules through
membranes made only of
phospholipids (phospholipid bilayer)
Molecule
name
Size
Electric
charge
Able to cross lipid bilayer
membranes between
phospholipid molecules?
(large or
small)
(nonpolar,
polar charge,
or strong charge)
CO2
Small
Nonpolar
YES
O2
Small
Nonpolar
YES
H2O
Small
Polar
YES
glucose
Large
Polar
NO
Ion
Small
Strong
charge
NO
(carbon dioxide)
(Yes or No)
2b
WATER– THE
SOLVENT—
THE THING
THAT
DISSOLVES
THE SOLUTE
STARCH–
THE
SOLUTE—
THE THING
THAT GETS
DISSOLVED
IN WATER
(SOLVENT)
Question: 2b
Starch in beaker
Location of
color
change
shows that
only iodine
crossed
Iodine in cell
Question: 2b
Iodine
Starch
IODINE (SMALL
MOLECULE) INSIDE
STARCH (LARGE
MOLECULE)
OUTSIDE
COLOR
CHANGE
OBSERVED IN
BEAKER
Starch
Iodine
STARCH (LARGE
MOLECULE) INSIDE
IODINE (SMALL
MOLECULE)
OUTSIDE
COLOR
CHANGED
OBSERVED IN
TUBE
Question: 3
DIFFUSION IS THE
RANDOM
MOVEMENT OF
PARTICLES FROM
HIGH TO LOW
CONCENTRATION
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
6a.
SOLUTION IS
HYPOTONIC
TO CELL.
MORE
WATER
MOVES IN
Question: 6b
SOLUTION IS
HYPERTONIC
TO CELL.
MORE
WATER
MOVES OUT
6c.
SOLUTION
AND CELL
ARE
ISOTONIC.
WATER
MOVES IN
AND OUT
EQUALLY
6.
CELL IS IN A HYPOTONIC SOLUTION
(CELL IS HYPERTONIC)
CELL IS IN A HYPERTONIC SOLUTION
(CELL IS HYPOTONIC)
CELL IS IN AN ISOTONIC SOLUTION
Cell membrane structure
Water molecules
Polar head faces
out towards water
because of the
attraction
Nonpolar tails face
inward so they are
protected from water
Water
Passive transport
Question: 7a
Question: 7b
Simple diffusion
Facilitated diffusion
GLUCOSE
CO2
Concentration Gradient
Carrier protein
SMALL, UNCHARGED
MOLECULES MOVE THIS WAY
LARGER, UNCHARGED
MOLECULES MOVE THIS WAY
Question: 7c
Active transport
MOVEMENT IS LOW TO
HIGH CONCENTRATION
THIS PROCESS REQUIRES
ENERGY (ATP)
Concentration Gradient
LARGE OR CHARGED
MOLECULES MOVE THIS WAY
Calcium ion (Ca+)
ATP
Carrier protein
• Question: 8
SIMPLE
DIFFUSION
FACILITATED
DIFFUSION
ACTIVE
TRANSPORT
HIGH TO LOW
CONCENTRATION
HIGH TO LOW
CONCENTRATION
LOW TO HIGH
CONCENTRATION
(MORE TO LESS)
(MORE TO LESS)
(LESS TO MORE)
SMALL,
UNCHARGED
MOLECULES
DIRECTLY
ACROSS THE
MEMBRANE
BILAYER
BIG/LARGE,
UNCHARGED
MOLECULES
REQUIRES A PROTEIN
CHANNEL/CARRIER
BIG/LARGE,
CHARGED
MOLECULES
REQUIRES A PROTEIN
CHANNEL/CARRIER
NO ENERGY
REQUIRED
NO ENERGY
REQUIRED
ENERGY
REQUIRED
PASSIVE
PASSIVE
ACTIVE