1. Pick up the handout from the front.
DO NOW 4/18
Pick up the handout from the front.

2. Review materials Write down the following:
Website: acceleratelearning.com
Login = ecisd[your student id number]
Password = [your student id number]

3. EOC REVIEW 4a, 4b

4. Organelles
Nucleus : contain DNA so they have all the information (like the brain)
Ribosomes: Where the proteins are made (transcription)
Cell membrane: controls what comes in and out of the cell (homeostasis)
Cell Wall: Provides protection and support (makes it sturdier)
Mitochondria: where cellular respiration occurs; breaks down sugar a converts into ATP (energy)
Vacuoles: Stores water, and other molecules for the cell
Lysosome: cleans up waste in the cell
Golgi apparatus: sorts and packages molecules for transport
Chloroplast: The site of photosynthesis; converts solar energy into glucose
Endoplasmic reticulum: helps create and store lipids and to create and transport proteins

5. Hierarchy of life CELLS are the most basic unit of LIFE
Groups of similar cells make up TISSUE
Groups of tissue working together make up ORGANS
Organs work together to make up ORGAN SYSTEMS
Organ systems make up the ORGANISM
Groups of the same organism make up a POPULATION
Many populations make up a COMMUNITY
ECOSYSTEMS are living and nonliving factors of an area

6. Cells All Prokaryotic cells have: All cells have:
cell walls (so do plant cells)
mode of locomotion i.e. flagellum
or cilia (so do some animal cells)
All cells have:
Cell membrane (plasma membrane)
Ribosomes
Nucleic acid (DNA & RNA)

7. Eukaryotic and Prokaryotic cells
Eukaryotic Cell
Prokaryotic cell
Plant & Animal cells
Has membrane bound organelles
Nucleus
Mitochondria
Golgi apparatus
Chloroplast
Endoplasmic reticulum
vacuole
Does not contain membrane bound organelles
Bacteria

8. Eukaryotic cells PLANT ANIMAL Unique to plants:
Cell wall
Chloroplast
Large vacuole
Unique to animal cells:
Centrioles
Lysosomes
Many small vacuoles

9. LIPID BILAYER
The cell membrane is made up of two
layers of lipids

10. Protein channel specific substances across a cell membrane.
 a protein that allows the transport of
specific substances across a cell membrane. 

11. Semipermeable membrane
Membrane that allows some things to pass while others cannot
The cell membrane is semi-permeable
In osmosis, WATER moves from an area of HIGH to an area of LOW concentration.
In diffusion, MOLECULES move from an area of HIGH to an area of LOW concentration.

12. Transport of molecules in and out of the cell
If the dark molecules could move, in what direction would
they move? Why?
To the left, moves from high to low concentration
Why did the large dark molecules NOT move to the left?
Too large to pass through the membrane

13. Hypotonic solution
a. Salt inside the cell = 65% and outside the cell 40%.

14. Hypertonic solution
Sugar inside the cell 27% and outside 80%.

15. Low to high or High to low? Exocytosis & endocytosis
Passive Transport
Active Transport
Requires energy? NO
YES
Low to high or High to low?
High to Low
Low to high
Examples
Diffusion & osmosis
Exocytosis & endocytosis