1. explain the differences between plant and animal cells and tonicity. 2. since glucose is too big...
TRANSCRIPT
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
Daily Catalyst Class Business Active transport notes Lab work time Quiz #10
4/1 Daily Catalyst Pg. 44 Active Transport
Today, we will compare and contrast active and passive
transport.
4/1 Objective
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
ACTIVE TRANSPORT
Key Point #2: The movement of molecules against the
concentration gradient.
Concentration Gradient
Example: the Sodium-Potassium pump
Active Transport
Active Transport 2 types:
Key point #3: Endocytosis: Molecules brought into the cells.
EN=IN
Endocytosis
Molecules are brought into the cell and the membrane pinches off, creating a vesicle.
Key Point #4: A vesicle is made of phospholipids
Vesicles
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
Exocytosis and endocytosis are examples of active transport and require ATP.
http://www.dnatube.com/video/358/Endocytosis
Video Clip
Exocytosis
What type of transport?
Endocytosis
What type of transport?
What kind of solution (hypotonic, isotonic, or hypertonic) does the cell shrink in?
Hypertonic
Tell me what you know?
Active transport
What type of transport?
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)
Lab Work Time
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)
Quiz #10