Upload
silvia-fowler
View
216
Download
2
Tags:
Embed Size (px)
Citation preview
1. Be able to identify cell parts/proteins and describe their functions
2. Be able to say why cells have to be small.
3. Be able to describe the movement of particles and water in an environment and in a cell.
4. Be able to describe Hyper, Hypo, & Isotonic solutions
Goal for the Day
Question of the Day 11/25
If a cell has a cell wall (like in _______, _________, _________, ___________, & some __________ does it still have a cell membrane?
Explain your answer.
Skills Check TUESDAY Cell parts
1. Matching Cell parts/proteins & functions
2. Identifying what 5 cell parts could be found in all cells
3. Identifying whether cell parts belong in Prokaryotes, Eukaryotes, or Both
4. Identifying whether cell parts belong in Animals, Plants, or Both
Diffusion• Cell’s rely on diffusion to pass materials,
including nutrients and wastes in and out of their cells.
• Diffusion- movement of particles from high concentration to low concentration.– HIGH LOW
–GOAL IS TO REACH EQUILIBRIUM
DiffusionDiffusion- movement of particles from high concentration to low concentration.
– HIGH LOW
Diffusion occurs through the random motion of particles (does not require energy)!
Diffusion Demonstration
• Predict what will happen to food coloring that is put into the flask. Describe what you think will happen, and why you think that will happen. ?
All cells are relatively……
• Small
• Are there exceptions?
• Why are cells generally small? • What limits cell size?
Cell Size•Small cells function more efficiently than large cells – small cells can diffuse nutrients in & wastes out more quickly!
•This is due to a cell’s surface area to volume ratio
•Cells with a _____ surface Area/Volume ratio (more surface area/volume) more efficient
Cell Size•Surface area – area of the cell membrane
•Volume – how much stuff can fit inside the membrane
•If a cell’s surface area–to-volume ratio is too low, substances cannot enter and leave the cell well enough to meet the cell’s needs.
Surface- Area to Volume Ratio
Which has the higher surface area to volume ratio?
In which one could you reach the middle the fastest?
Osmosis• Osmosis - The diffusion of water
through a selectively permeable membrane ( _______ to ________)
• GOAL IS TO REACH EQUILIBRIUM
• Osmosis - The _____________ of ____________ through a _____________ membrane. Always travels from an area where water is ______________ to an area where water is ___________. ( _______ to ________)
• GOAL IS TO REACH ________________
Prefixes:HYPO = _____ HYPER = ______ ISO = _______
Solutions:
HYPOtonic - ___________ solute concentration
HYPERtonic - ___________ solute concentration
ISOtonic - ____________ solute concentration
Water and Solute concentration are always opposite of each other!
So when SOLUTE is HIGH, as in a
______ tonic solution, then water is _____.
So when SOLUTE is LOW, as in a _______ tonic solution, then water is __________.
Work on
1. Work on cell part & function Review (ONLINE)
2. Cell is like project
3. Study for skills check TUESDAY
Skills Check Tuesday Cell parts
1. Matching Cell parts/proteins & functions
2. Identifying what 5 cell parts could be found in all cells
3. Identifying whether cell parts belong in Prokaryotes, Eukaryotes, or Both
4. Identifying whether cell parts belong in Animals, Plants, or Both
Species of the day 11/25
Turkey Meleagris gallopavo
Species of the day 11/25
Turkey
Meleagris gallopavo
Turkeys are a EUKARYOTIC organism.
Name the 4 groups of Eukaryotic organisms.