December
th
10 ,
2014
Complete problems 12
and 13 on your ALA
sheet. You have 7
minutes to complete
both problems. (3.5
mins/question)
Agenda
 Catalyst (8 minutes)
 Tables and Figures Guided Practice (15
minutes)
 Interpreting Tables and Figures
Independently (15 minutes)
 Exit Ticket (Remaining)
 Homework:
 Finish wksht if you do not in class
 Study for a quiz/test on passive vs. active
transport—There will also be solution bonus
questions!!!
Announcements
 Mastery packets due December 15th,
2014
Unit 4.2: Guiding Questions
 How do cells take in the nutrients
they need and release the
substances they do not?
Today’s SPI & Objectives
 SPI 3210.1.8 Compare and contrast active and
passive transport.
 SWBAT compare and contrast passive and
active transport in terms of molecule
movement and energy usage
 SWBAT interpret a diagram or table to
determine whether it is depicting passive or
active transport
Review: Passive Transport
 Passive transport:
 Molecules move from high  low
concentration
 With the concentration gradient
 No energy is needed
Review: Active Transport
 Active transport:
 Molecules move from low high
concentration
 Against the concentration gradient
 Energy and transport proteins are needed
Endocytosis/Exocyto
sis
• Endocytosis: cells absorb molecules by engulfing them
• Exocytosis: cell releases waste material using secretory vesicles
Interpreting a Figure: Follow along
on the practice worksheet!!!
 Question 1: Figure
 Where is there a higher
concentration?
 Outside of the cell
 Do molecules move from
high  low or low 
high concentration
 High  low
concentration
Interpreting a Figure
 Question 1: Figure
 What type of transport is
this?
 Passive transport
 Is it diffusion or
facilitated diffusion?
 Facilitated diffusion
(transport proteins
used)
Interpreting a Table
 Millimoles (mM) are units that measure concentration
 Question 2: Interpreting a table
a. Is the concentration of oxygen higher inside or
outside of the cell at 0 seconds?
•
Outside of the cell
b. Is oxygen moving into or out of the cell during the 90
seconds?
•
Into the cell
c. Is oxygen moving from high  low concentration or
from low  high concentration?
•
High  low concentration
Interpreting a Table
 Question 2: Interpreting a table
d. Is this an example of passive or active
transport?
•
Passive transport
e. Does it require energy to move the oxygen
molecules across the cell membrane?

No. Energy is not required
Passive vs. Active Transport WS
 Complete Independent Practice
questions on the Passive vs. Active
Transport Worksheet
 If you complete  Ms. M check
 If you do not complete  homework
Exit Ticket
 1. Large molecules are ejected from the cell using what
process?
 2. Draw a diagram that represents active transport.
 3. Draw a diagram that represents passive transport.
Catalyst #5: December 11th, 2014
Agenda
 Catalyst: 5 minutes
 Unit 4.2 Review Game: 15 minutes
 Unit 4.2 mini-assessment: Remainder
 Homework:
 Semester 1 Study Guide
Announcements
 Mastery packets due December 15th
Question 1
 Does water move from high solvent to low
solvent concentration OR from low solvent
to high solvent concentration during
osmosis?
 Answer: From high solvent (higher % of
water) to low solvent (lower % of water)
concentration.
 #1 on the Unit 3 Practice Test
Question 2
 What happens to a cell when it is placed
in an isotonic solution?
 Answer: The cell remains the same size
in an isotonic solution because the same
amount of water moves into and out of
the cell
 #2 & 3 on the Unit 3 Practice Test
Question 3
 Where does more water move when a
solution has a higher solute
concentration than the inside of the
cell?
 Answer: More water moves out of the
cell until the solute concentration is the
same inside and outside of the cell
 # 4 on the Unit 3 Practice Test
Question 4
 What type of solution causes the cell to
swell
 Answer: Hypotonic ; because more
water moves into the cell
Question 5
 What type of solution has the effect
shown by the cells below?
 Answer: A hypertonic solution– causes
the cell to shrink as more water moves
out of the cell
 #5-7 on the Unit 3 Practice Test
Question 6
 In what direction do molecules move
during passive transport?
 Answer: From high to low concentration
(with the concentration gradient)
 #8-9 on the Unit 3 Practice Test
Question 7
 What type of cellular transport
requires energy?
 Answer: Active transport requires
energy; passive transport does not
use energy
 #10 on the Unit 3 Practice Test
Question 8
 Oxygen enters the cell without the use of
energy and without the help of transport
proteins. Does oxygen move through
diffusion, facilitated diffusion, or active
transport?
 Answer: Diffusion
 #11 - #12 on the Unit 3 Practice Test
Question 9
 What type of cellular
transport is shown in
the figure to the
right?
 Answer: Passive
transport (high  low
concentration)
 # 13 on Unit 3 Practice
Test
Question 10
 Are molecules moving by passive or active
transport?
 Answer: Passive transport (high  low
concentration)
 # 14 on the Unit 3 Practice Test
Time
Concentration Inside
Concentration Outside
0 seconds
150 mM
750 mM
30 seconds
300 mM
600 mM
60 seconds
450 mM
450 mM
Unit 4.2 Mini-Assessment
 Independently. By yourself. In your seat.
 On a sheet of paper. We will be trading and grading.