Download Week 2-7 - Cobb Learning

Week 2-7
Cell Processes
Mind Stretcher
Prokaryotes
1. DNA of _____________
is found as a
circular ring.
2. Most of a cell’s ATP (energy) is made
and stored in the inner membrane of
mitochondria
the ___________________.
3. The outermost layer of a plant cell is
cell wall
the ________________
and is
responsible for strength and support.
Cell Processes Notes
Background Info
□ Molecules are in constant motion, and
tend to move from areas of higher
concentrations to areas of lesser
concentration.
Define Diffusion
The movement of molecules from an
area of high concentration to an area
of less concentration.
Draw a diagram of an example of
diffusion we saw in class.
Define osmosis
□ The diffusion of water across a
selectively permeable membrane.
Define osmosis
http://www.usd.edu/~bgoodman/Osmos.htm
Define osmosis
□ In this picture a red blood
cell is put in a glass of
distilled water (all water with
no salt or sugar in
it). Because there is a
higher concentration of
water outside the cell, water
enters the cell by
OSMOSIS. In this case too
much water enters and the
cell swells to the point of
bursting open. In the end
pieces of cell membrane
are left in the water.
http://www.usd.edu/~bgoodman/Osmos.htm
Selectively permeable membrane
□ A membrane that allows only certain
materials to cross it
□ Materials pass through pores in the
membrane
OSMOSIS
Why are osmosis & diffusion
important?
□ All living things have certain
requirements they must satisfy in order
to remain alive – maintain homeostasis
□ These include exchanging gases
(usually CO2 and O2), taking in water,
minerals, and food, and eliminating
wastes.
□ These tasks happen at the cellular
level.
Passive Transport
□ Osmosis and Diffusion are types of
passive transport; this means that they
do not need energy to move.
(happen naturally)
Active Transport
□ This requires energy to move
molecules from low concentration to
high concentration. (moving against
what is natural)
□ Endocytosis: the process of bringing a
particle into the cell
□ Exocytosis: the process by which a
particle is removed from the cell
Summarizer
□ Toss the summarizer ball
4–2–1
□ Generate 4 words that you think
capture the most important points of
this lesson. (NO VOCABULARY TERMS)
□ Share with your neighbor and put a
check next to the words you have in
common. Determine 2 words that you
both agree capture the most important
points of the lesson and circle them.
□ Each pair shares with another pair their
2 words. Decide as a group the 1 most
important point of the lesson. Write this
word on the back.
Evaluate and Reflect on Test
□ On the scantron write: “Evidence of S7L2b
Check Yes if you got 80 or above
____ Yes
_____ No”
□ Review all missed questions.
□ On your own paper list:
□ 3 concepts this test proves you understand.
□ 3 misconceptions you had on this test.
□ Write a one paragraph reflection explaining:
□ Why this grade reflects your learning.
□ How you could improve this grade.
TRAFFIC LIGHT
I will STOP doing…
I will THINK about…
I will START doing…
Mind Stretcher
high
1. Materials move from areas of _______
low
concentration to areas of ___________
concentration.
2. The Cell membrane is said to be
Semi permeable
________________.
3. The process of absorbing sunlight and
taking in carbon dioxide and water
to make sugar and oxygen is called
Photosynthesis
____________.
Cell Processes (preview)
Diffusion: the movement of particles
from regions of higher density to
regions of lower density
Osmosis: the diffusion of water through a
semipermeable membrane.
Cell Processes (Preview)
Passive Transport: the movement of
substances across a cell membrane
without the use of energy by the cell.
Active Transport: the movement of
substances across the cell membrane
that requires the cell to use energy.
4–2–1
□ Generate 4 words that you think
capture the most important points of
this lesson. (NO VOCABULARY TERMS)
□ Share with your neighbor and put a
check next to the words you have in
common. Determine 2 words that you
both agree capture the most important
points of the lesson and circle them.
□ Each pair shares with another pair their
2 words. Decide as a group the 1 most
important point of the lesson. Write this
word on the back.
NO Mind Stretcher
□ Get out your homework and check it.
□ Get out a piece of paper
□ Give yourself a grade and write it on
the top of your quiz paper: 1,2, or 3
□ Put your heading on it.
□ Number 1-5, do not skip lines.
Checkpoint 4-2
1. Oxygen is released during
___________________.
2. Carbon dioxide is released during
___________________.
3. Cellular Respiration happens in
(plant/animal/both type) cells.
4. Mitochondria perform ___________________
to make ATP.
5. Chloroplasts perform _______________ to
make glucose.
Checkpoint 4-2
1. Oxygen is released during
___________________.
2. Carbon dioxide is released during
___________________.
3. Cellular Respiration happens in
(plant/animal/both type) cells.
4. Mitochondria perform ___________________
to make ATP.
5. Chloroplasts perform _______________ to
make glucose.
Checkpoint 4-1
1. The movement of particles from regions of
higher concentration to regions of lower
concentration is called______________.
2. The diffusion of water through a
semipermeable membrane is called
____________.
3. Endocytosis: into or out of the cell?
4. Exocytosis: into or out of the cell?
5. T or F The movement of particles from less
crowded to more crowded requires
energy.
Checkpoint 4-1
1. The movement of particles from regions of
higher concentration to regions of lower
concentration is called______________.
2. The diffusion of water through a
semipermeable membrane is called
____________.
3. Endocytosis: into or out of the cell?
4. Exocytosis: into or out of the cell?
5. T or F The movement of particles from less
crowded to more crowded requires
energy.
Password
□ 1s face the screen
□ 2s face their partner
□ 1s: Look at next slide and give clues to
partner to have them guess each box
Start at the bottom left
□ Move to the next box if correct
□ Sit down when all 3 have been guessed.
Mind Stretcher
Particles/molecules
1. In diffusion, __________move from areas of
high
________
concentration to areas of
low
__________
concentration.
water
2. In osmosis, _______
molecules move from
high
areas of __________
concentration to areas
low
of _____________
concentration.
3. What part of the cell do materials pass
through to get into and out of the cell?
Cell Membrane
Password
exocytosis
Passive
Diffusion
Transport

Active Transport
Osmosis
Semipermeable
Membrane
Password
chloroplast
Photosynthesis
Cell Wall

Cell Membrane
Nucleus
Mitochondria
Why are osmosis & diffusion
important?
Mind Stretcher - Friday
1. Tommy pours salt on a slug. It shrivels
up. Why? The salt draws water out of the slug. (Osmosis)
2. Plants draw water up from the soil,
There is a greater concentration of water in the
through
their
roots
the
ground
or roots
of theto
plant
than leaves.
in the leaves. This
water to flow up the plant, called “osmotic
How? causes
pressure”.
3. A man drinks a gallon of salt water
everyday
for 60%
a week
and
of
His organs are around
water. Drinking
saltdies
water draws
water from his organs and into his digestive system. This leads
dehydration.
How does this happen?
to organ failure through osmosis!
Summarizer
□ Osmosis and diffusion are similar in that
they both………., but osmosis ……..,
while diffusion…………………