Name ______________________________________ Test Date _______________________ Block ___________
Unit 4 Study Guide – Cell Transport, Cell Respiration & Photosynthesis
1. Cell Transport Vocabulary
Vocab Term
Definition
Passive Transport
Materials going from high concentration to low concentration
across the cell membrane
Examples are osmosis and diffusion
Analogy/Diagram
Analogy:
The passing of a material across the cell membrane
Diagram:
The passing of water across the cell membrane
Diagram:
Analogy:
Active Transport
Materials going from low concentration to high concentration.
This requires energy!
Examples are endocytosis and exocytosis
Endocytosis
the active transport of taking large molecules and enveloping
them into the cell
Exocytosis
the active transport of taking large molecule and putting them
outside the cell
Diffusion
Osmosis
Amount of a substance in a given space
putting garbage in a trash can
that is already full.
Diagram:
Concentration
Reactant
Product
The materials that begin a chemical reaction
The materials that are produced from a chemical reaction
Example:
In photosynthesis the
reactants are CO2 and H2O
Example:
In cellular respiration
the products are CO2 and H2O
Analogy:
Semi-permeable
membrane
membrane that can selective chose what goes into and out of
the cell
2. Why are both osmosis and diffusion types of passive transport? Explain your answer. _______________Because
the happen without the cell needing to use any energy. ____
3. Fill in the following chart using your notes:
Active Transport
Only
Similarities between Active and
Passive Transport
Passive Transport
Only
Occurs at the cell membrane Does not require energy
Requires energy
Movement of molecules
Exocytosis
Endocytosis
Diffusion
Osmosis
High  Low
Low  High concentration
4. Does the following diagram show osmosis or diffusion? Why?
It shows osmosis because there is water moving from area of
high concentration to low concentration. If it was sugar the
arrow would only be going to the left.
5. Draw arrows in the diagram below indicating which direction
the molecules will travel across the cell membrane to
eventually reach equilibrium. What will happen to the size of the cell?
Arrows should be drawn to show H2O going into the cell and KCL out of the cell.
H2O
KCl
KCl
H2O
H2O
H2O
H2O
KCl
KCl
H2O
KCl
KCl
KCl
H2O
H2O
H2O
6. What role do the chloroplasts play in the process of photosynthesis?
__Photosynthesis takes place in the chloroplast due to the presense of
chlorophyll.___________________________
7. Where does cellular respiration take place? __In the mitochondria (all eukaryotic cells)__________
8. Explain in detail the process of photosynthesis: _____Water is taken in through the leaves and roots of plants
and CO2 is taken through the leaf. They enter the plant cells due to osmosis and diffusion. Within the
chloroplast, chlorophyll allows sunlight to turn these raw materials into glucose and O2.
9. Write out the complete chemical equation for photosynthesis:
6CO2 + 6H2O → C6H12O6 + 6O2
10. Write out the complete chemical equation for cellular respiration:
C6H12O6 + 6O2 →6CO2 + 6H2O
11. Why is the sun part of every food web diagram? ___The sun is the original source of energy every organism on
the planet________________________________________________________
12. Explain the following terms in relation to food webs:
Producer ___Produces it’s own energy through photosynthesis _______________________
Consumer _____has to consume other organisms for energy____________________________
13. Draw a food web that could be observed in your backyard: