Topic: Cell Processes
Aim: Describe the two types of passive
transport.
Do Now: You have 2 minutes to copy the
topic, aim and homework. The do now
activity is on the next slide.
HW: Venn Diagram of diffusion and osmosis
(on loose-leaf).
Exit Card…5 minutes
Compare and contrast passive and active transport by
completing one of the following.
Write a paragraph of at least 4 sentences comparing and
contrasting passive and active transport. Be sure to use
the following terms: particles, energy, high concentration,
low concentration.
OR
Compare and contrast passive and active transport by
drawing diagrams of each type. Be sure to label the
particles, high concentration, low concentration, energy.
Draw an arrow showing the movement of the particles.
http://www.online-stopwatch.com/
Identify the 2 types of passive transport.
DIFFUSION
LOW
HIGH
1. Identify the high and low
concentration.
2. Identify the type of
transport the diagram
represents.
3. When will this process
stop?
Diffusion
• Movement of
particles from a
HIGH to LOW
concentration
• NO ENERGY
• Ex: CO2, O2,
glucose, sucrose,
H2O, etc…
The animation above is showing the movement of
glucose molecules across a membrane. Describe
what is happening in this process.
Explain why this diagram represents
diffusion.
HIGH
LOW
The diagram represents water molecules moving.
1. Identify the high and low concentration.
2. Describe how the water molecules will move.
3. Identify the type of passive transport
occurring. Support your answer.
Osmosis
Cell membrane
Inside cell
High conc. of water
molecules.
Outside cell
Low conc. of water
molecules.
Osmosis
Cell membrane
OSMOSIS
Inside cell
High conc. of water
molecules.
Outside cell
Low conc. of water
molecules.
• Movement of WATER
molecules through a
membrane from a HIGH
to LOW concentration
• NO ENERGY
https://www.youtube.com/watch?v=XXVc7HXjRp8
What happens when a cell is placed in a
SALT SOLUTION?
33%
H2O
72% H2O
• H2O ALWAYS
diffuses OUT of
the cell
Normal red blood
cell and normal
plant cell
Red blood cell and
plant cell
surrounded by salt
solution
What happens when a cell is placed in a
DISTILLED WATER?
100%
H2O
72% H2O
• Water ALWAYS
diffuses INTO the
cell
Normal red blood
cell and normal
plant cell
Red blood cell and
plant cell in
distilled water
What happens when a cell is placed in a
solution with the same water concentration?
72%
H2O
72% H2O
• Cell remains the
same
1. Identify the type of transport occurring when
the molecules move from area A to area B.
Support your answer Passive transport
Molecules are moving from a HIGH to LOW concentration.
2. Identify the type of transport occurring when
the molecules move from area B to area A.
Support your answer. Active transport
Molecules are moving from a LOW to HIGH concentration.
3. Identify the type of passive transport occurring if
WATER molecules move from area A to area B. Support
your answer. Osmosis
WATER is moving from a HIGH to LOW concentration.
4. Identify the type of passive transport occurring if
glucose molecules move from area A to area B. Support
your answer. Diffusion
GLUCOSE is moving from a HIGH to LOW concentration.
The movement of materials from
higher to lower concentration
is called
1. diffusion
2. active transport
3. pinocytosis
4. phagocytosis
Which process requires cellular
energy?
1. diffusion
2. passive transport
3. active transport
4. osmosis
The movement of water from
higher to lower concentration
is called
1. pinocytosis
2. active transport
3. osmosis
4. phagocytosis
Damage to which structure will most
directly disrupt water balance
within a single-celled organism?
1. ribosome
2. cell membrane
3. nucleus
4. chloroplast
Sodium ions are pumped from a region
of lower concentration to a region of
higher concentration in the nerve cells
of humans. This process is an example
of
1. diffusion
2. osmosis
3. passive transport
4. active transport
The movement of materials from
lower to higher concentration
requiring energy in the form of
ATP is called
1. movement
2. diffusion
3. active transport
4. cell division
The movement of glucose molecules
from a high to low concentration
is known as
1. locomotion
2. diffusion
3. active transport
4. osmosis
Exit Card…
Compare and contrast diffusion and osmosis by
completing one of the following.
Write a paragraph of at least 4 sentences comparing
and contrasting diffusion. Be sure to use the following
terms: particles, energy, high concentration, low
concentration.
OR
Compare and contrast diffusion and osmosis by drawing
diagrams of each type. Be sure to label the particles or
water, high concentration, low concentration. Draw an
arrow showing the movement of particles or water.
COMPARE
Passive and active transport both involve the
movement of substances.
CONTRAST
Passive transport does not require energy while
active transport does require energy.
During passive transport substances move from a
high to low concentration. During active transport
substances move from a low to high concentration.