4/1 Daily Catalyst Pg. 44 Active Transport
 1. Explain the differences between plant and animal
cells and tonicity.
 2. Since glucose is too big to cross the cell membrane
and if water is not moving, what is another way for
glucose to enter the cell?
4/1 Daily Catalyst Pg. 44 Active Transport
 Quiz #10 TODAY
 Cell and Transport test on Wednesday
 Review day on Tuesday
 M.C. on cells and transport
 Tutoring available
 Spring Break review packet due Tuesday,
April 7th
4/1 Daily Catalyst Pg. 44 Active
Transport
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Daily Catalyst
Class Business
Active transport notes
Lab work time
Quiz #10
4/1 Objective
 Today, we will compare and contrast
active and passive transport.
Passive vs. Active Transport
Passive Transport
 Osmosis
 Movement of water
 Passive
 No energy
 High to low
 Across the membrane
 Diffusion
 Movement of molecules
 Passive
 No energy
 High to low
 Across the membrane
 Label the following cells are isotonic,
hypertonic, or hypotonic
1
2
3
Passive vs. Active Transport
 Key point #1: Active Transport
 the movement of molecules from low to high
concentration
 Requires ENERGY
 ATP
Concentration Gradient
Key Point #2:
 The movement of molecules against the
concentration gradient.
Active Transport
Example: the Sodium-Potassium pump
 Active Transport
 2 types:
Endocytosis
 Key point #3: Endocytosis:
 Molecules brought into the cells.
 EN=IN
Vesicles
 Molecules are brought into the cell and the membrane pinches
off, creating a vesicle.
 Key Point #4: A vesicle is made of phospholipids
Exocytosis
 Key point #5: Exocytosis:
 Molecules exit the cell
 EXO=EXIT
Exocytosis
 The vesicle fuses with the membrane and ejects the
contents to the outside of the cell.
 Exocytosis and endocytosis are examples of active
transport and require ATP.
Video Clip
 http://www.dnatube.com/video/358/Endocytosis
What type of transport?
 Exocytosis
What type of transport?
 Endocytosis
Tell me what you know?
What kind of solution (hypotonic,
isotonic, or hypertonic) does the
cell shrink in?
Hypertonic
What type of transport?
 Active transport
Lab Work Time
 Directions: With your lab group, complete day 3 instructions. Be
sure to measure final mass, take observations, and record results.
You will work on the charts on your own time.
 Time: 15 minutes
 Noise: 2 (with group)
Quiz #10
 Directions: Silently and independently complete quiz
#10. Turn your quiz into the basket and begin working
on your spring break packet or lab report.
 Time: 10 minutes
 Noise: 0 (SILENT)