2. Identify the cell organelles using the clues provided.
Bell Ringer Day 28
Identify the cell organelles using the clues provided.
1. OIESOMBR
2. YSLSOMOE
3. TSYMAOLCP
4. ESLCUUN
5. NACITHIRMDOO
6. LECLLAWL
I have a way with amino acids!
I’m the garbage man!
You can find everything in me!
I’m the “brain” of the cell.
I have all the “power” you’ll need.
I’m found all “around” a plant cell.

3. Cell Transport
Concentration gradient: the difference in amount of a substance in one area compared to another area
LOW CONCENTRATION
HIGH CONCENTRATION

4. 1) PASSIVE TRANSPORT Requires no energy
Particles move down the concentration gradient (from high concentration to low concentration)

5. Simple diffusion:
Particles move across the membrane from area of high concentration to low concentration
Equilibrium: when both sides have the same concentration, diffusion occurs at the same rate in both directions

6. B) Facilitated diffusion:
Special proteins form channels that let large molecules diffuse across the membrane
Particles move from high concentration to low concentration

7. C) Osmosis:
Diffusion of water across a selectively permeable membrane

8. 2) ACTIVE TRANSPORT Requires the use of energy
Moves materials from low concentration to high concentration
Protein “pumps” transport small molecules and ions
Large particles transported by endocytosis and exocytosis
Exocytosis
Endocytosis

9. OSMOSIS diffusion of water across a selectively permeable membrane
Solute: a substance that is dissolved into another substance
Solvent: a substance that dissolves another substance (often water)

10. Hypotonic: solution with LOWER solute concentration
Isotonic: solution with the SAME solute concentration
Hypertonic: solution with HIGHER solute concentration
Hypotonic Solution
Isotonic Solution
Hypertonic Solution

11. Hypotonic Solution
Water moves
INTO cell
Isotonic Solution
Water moves
in and out
at same rate
Hypertonic Solution
Water moves
OUT of cell