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Cellular Transport 2

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Devin Heggie

on 27 January 2015

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Transcript of Cellular Transport 2

Cellular Transport (Part II)
Active Transport
Active Transport
is movement of substances across the plasma membrane
against the concentration gradient and requires energy
.
Objectives
I CAN explain the process of osmosis and active transport.

I CAN predict the effect of a hypotonic, hypertonic or isotonic solution on a cell.
Osmosis
Osmosis
is the
diffusion of water
across a selectively permeable membrane.
Hypertonic
solution is a solution that
has a higher concentration of solute than the cell
.
Isotonic
solution is a solution that
has

the same concentration of water and solutes as the cell.
Transport of Large Particles
Hypotonic
solution is a solution that
has a lower concentration of solute than the cell
.
Some substances are too large to move through the plasma membrane by diffusion or transport proteins and get inside the cell by a different process.
Diffusion Review
Cellular transport moves substances within the cell and moves substances into and out of the cell.
Diffusion
is the net
movement
of particles from an area

of
high concentration
to an area of
low concentration
.
Hypertonic Solution
Isotonic Solution
Exocytosis
Exocytosis
is the
release of materials
at the plasma membrane
to expel wastes and to secrete substances
, such as hormones, produced by the cell.
Endocytosis
Endocytosis
is the process by which a cell
surrounds a substance
in the outside environment,
enclosing the substance
in a portion of the plasma membrane. The membrane then pinches off and
leaves the substance inside the cell
.
Do Now
The diagram shown depicts structures found in a cell.
Hypotonic Solution
hypo-
latin for under
hyper-
latin for above
latin for under
iso-
Essential Questions
How does the plasma membrane prevent certain substances from entering the cell?

How are cells affected by different concentration solutions?


Match the term with its correct description:
a. energy e. active transport
b. facilitated diffusion f. exocytosis
c. endocytosis g. hypertonic solution
d. passive transport h. hypotonic solution

1. _____ A solution that has a higher concentration of solute than the cell
2. _____ Is used during active transport but not passive transport
3. _____ Process by which a cell takes in material by forming a vacuole around it
4. _____ Particle movement from an area of higher concentration to an area of lower concentration
5. _____ Process by which a cell expels wastes from a vacuole
6. _____ A form of passive transport that uses transport proteins
7. _____ Particle movement from an area of lower concentration to an area of higher concentration
8. _____ A solution which would cause the cell to swell and possibly burst

Match the term with its correct description:
a. transport protein d. passive transport g. exocytosis
b. active transport e. osmosis h. equilibrium
c. diffusion f. endocytosis

9. _____ The diffusion of water through a cell membrane
10. _____ The movement of substances through the cell membrane without the use of cellular energy
11. _____ Used to help substances enter or exit the cell membrane
12. _____ When energy is required to move materials through a cell membrane
13. _____ When the molecules of one substance are spread evenly throughout another substance to become balanced
14. _____ A vacuole membrane fuses (becomes a part of) the cell membrane and the contents are released
15. _____ The cell membrane forms around another substance, for example, how the amoeba gets its food
16. _____ When molecules move from areas of high concentration to areas of low concentration
Independent Practice
Exit Ticket
Causes a cell to swell
Doesn't change the shape of a cell
Causes osmosis
Causes a cell to shrink
Isotonic Solution
Hypotonic Solution
Hypertonic Solution
Statement:
Directions: Fill in the chart with a check or (X).
1.
2.
3.
4.
What cellular process takes place in the structure labeled number 4?

A. DNA replication
B. lipid packaging
C. protein synthesis
D. energy production

1/21/2015
Directions: COPY the bolded question and the correct answer on your Do Now page. When finished, take out notes from yesterday.
Do Now
A plant cell's rate of oxygen release decreases steadily over the course of several hours. A decreasing rate of activity in which organelle could directly explain this change?

A. vacuole
B. ribosome
C. chloroplast
D. mitochodrion
1/23/2015
Directions: COPY the bolded question and the correct answer on your Do Now page. When finished, take out notes from yesterday.
Enzymes are catalysts. How do enzymes increase the reaction rate?

A. transfer inhibitors away from reactants
B. provide a site for substrates to react
C. transfer substrates to ribosomes
D. provide energy to reactants
Do Now
1/22/2015
Directions: COPY the bolded question and the correct answer choice on your Do Now page. When finished, begin reading passage.
Certain molecules are able to move across the cell membrane. Which diagram shows the process of passive transport?
RWDR: What Happens to the Food You Eat?
1. What additional information or evidence would most strongly support the author's reasoning in support of the claim that areas of the brain are involved in controlling eating?
2. What is the best explanation fro how Figure E7.8b adds to and improves the author's explanation of the roles of enzymes in breaking down of food?
3. Based on the text, why is chewing your food important?
4. What is the meaning of the word manufactured in paragraph 6?
5. Choose the sentence that best describes the function of liver cells.
A
B
C
D
What's the Best Organelle???
1. In groups of (4), based on prior knowledge, notes and textbook, decide which organelle you all feel is the most important of all.
2. Each group will devise and argument for why your organelle is the most important of all. All groups must complete a poster/billboard which will inform or advertise why your organelle is superior to all the others. You may also use any other type of prop that you can think of to relay your point.
3. Assign jobs of each individual in your group:
a. Leader - Keeps group on task, relays information to teacher
b. Designer - Designs and illustrates poster/billboard
c. Presenter - Presents ideas/argument to the class
d. Fact Checker - Makes sure that all information presented is accurate BEFORE it is presented. (Most knowledgeable member!)
4. Each group will have the opportunity to present to the class in a tournament debate style. Groups will compete with one another, judged by the class. All participants will receive credit but the winning group will receive points on upcoming exam.
All macromolecules (monomers/polymers and functions)
Carbohydrates
Proteins
Nucleic Acids
Lipids
Cell Theory
The 3 Principles
All Cell parts (organelles)
Plasma Membrane
Function
Parts and their individual function
Phospholipids and their structure
Carbohydrates
Proteins


Differences between Eukaryotic and Prokaryotic Cells
Differences between Plant Cells and Animal Cells
Passive Transport
Diffusion
Osmosis
Facilitated Diffusion
Active Transport
Endocytosis
Exocytosis
Solution Effects on Cells
Hypertonic Solution
Hypotonic Solution
Isotonic Solution
Dynamic Equilibrium
Study Guide
Full transcript