diffusion osmosis€¦ · following terms: osmosis, diffusion and active transport. what are...
TRANSCRIPT
Wh
at
ha
pp
en
s if y
ou
pu
t a
fe
w d
rop
s o
f fo
od
co
lori
ng
in
wa
ter?
Ov
er
tim
e, th
e m
ole
cu
les
of
co
lor
spre
ad
ou
t th
rou
gh
th
e r
est
of
the
wa
ter.
Wh
en
th
e m
ole
cu
les
are
eve
nly
sp
rea
d t
hro
ug
ho
ut
the
sp
ac
e, th
e w
ate
r w
ill b
ec
om
e a
n e
ve
n c
olo
r. T
his
pro
ce
ss o
f
mo
lec
ule
s m
ovin
g f
rom
an
are
a w
he
re t
he
re a
re lo
ts o
f m
ole
cu
les
to a
n a
rea
wh
ere
th
ere
are
few
er
mo
lec
ule
s is
kn
ow
n a
s d
iffu
sio
n.
Diffu
sio
n
Sm
all
mo
lec
ule
s c
an
pa
ss t
hro
ug
h t
he
pla
sma
me
mb
ran
e t
hro
ug
h a
pro
ce
ss c
alle
d d
iffu
sio
n.
Diffu
sio
n is
the
mo
ve
me
nt
of
mo
lec
ule
s fr
om
an
are
a w
he
re t
he
re is
a h
igh
er
co
nc
en
tra
tio
n
(la
rge
r a
mo
un
t) o
f th
e s
ub
sta
nc
e t
o a
n a
rea
wh
ere
th
ere
is
a lo
we
r c
on
ce
ntr
atio
n (
low
er
am
ou
nt)
of
the
su
bst
an
ce
(Fig
ure
be
low
). T
he
am
ou
nt
of
a s
ub
sta
nc
e in
re
latio
n t
o t
he
to
tal
vo
lum
e is
the
co
nc
en
tra
tio
n. D
urin
g d
iffu
sio
n, m
ole
cu
les
are
sa
id t
o f
low
do
wn
th
eir c
on
ce
ntr
atio
n g
rad
ien
t, f
low
ing
fro
m a
n a
rea
of
hig
h c
on
ce
ntr
atio
n t
o a
n a
rea
of
low
co
nc
en
tra
tio
n. M
ole
cu
les
flo
win
g d
ow
n a
co
nc
en
tra
tio
n
gra
die
nt
is a
na
tura
l p
roc
ess
an
d d
oe
s n
ot
req
uire
en
erg
y.
Diffu
sio
n c
an
oc
cu
r a
cro
ss a
se
mip
erm
ea
ble
me
mb
ran
e, su
ch
as
the
ce
ll
me
mb
ran
e, a
s lo
ng
as
a c
on
ce
ntr
atio
n g
rad
ien
t e
xis
ts. M
ole
cu
les
will
co
ntin
ue
to
flo
w in
th
is m
an
ne
r u
ntil e
qu
ilib
riu
m is
rea
ch
ed
. A
t e
qu
ilib
riu
m, th
ere
is
no
lo
ng
er
an
are
a o
f h
igh
co
nc
en
tra
tio
n o
r lo
w c
on
ce
ntr
atio
n, a
nd
mo
lec
ule
s flo
w e
qu
ally
in b
oth
dire
ctio
ns
ac
ross
th
e s
em
ipe
rme
ab
le m
em
bra
ne
. A
t e
qu
ilib
riu
m, e
qu
al
am
ou
nts
of
a m
ole
cu
le a
re e
nte
rin
g a
nd
le
avin
g a
ce
ll.
Osm
osi
s
The
diffu
sio
n o
f w
ate
r a
cro
ss a
me
mb
ran
e b
ec
au
se o
f a
diffe
ren
ce
in
co
nc
en
tra
tio
n is
ca
lled
osm
osi
s. L
et's
exp
lore
thre
e d
iffe
ren
t si
tua
tio
ns
an
d a
na
lyze
th
e f
low
of
wa
ter.
1.
A h
yp
oto
nic
so
lutio
n m
ea
ns
the
en
viro
nm
en
t o
uts
ide
of
the
ce
ll h
as
a lo
we
r c
on
ce
ntr
atio
n o
f d
isso
lve
d m
ate
ria
l
tha
n t
he
in
sid
e o
f th
e c
ell.
If
a c
ell
is p
lac
ed
in
a h
yp
oto
nic
so
lutio
n, w
ate
r w
ill m
ove
into
th
e c
ell.
Th
is c
au
ses
the
ce
ll to
sw
ell,
an
d it
ma
y e
ve
n b
urs
t.
2.
A h
yp
ert
on
ic s
olu
tio
n m
ea
ns
the
en
viro
nm
en
t o
uts
ide
of
the
ce
ll h
as
mo
re d
isso
lve
d m
ate
ria
l th
an
insi
de
of
the
ce
ll. If
a c
ell
is p
lac
ed
in
a h
yp
ert
on
ic s
olu
tio
n, w
ate
r w
ill le
ave
th
e c
ell.
Th
is c
an
ca
use
a c
ell
to s
hrin
k a
nd
sh
rive
l.
An
iso
ton
ic s
olu
tio
n is
a s
olu
tio
n in
wh
ich
th
e a
mo
un
t o
f d
isso
lve
d m
ate
ria
l is
eq
ua
l b
oth
in
sid
e a
nd
ou
tsid
e o
f th
e c
ell.
Wa
ter
still
flo
ws
in b
oth
dire
ctio
ns,
bu
t a
n e
qu
al a
mo
un
t e
nte
rs a
nd
le
ave
s th
e c
ell.
Ap
plic
atio
ns
of
Osm
osi
s
Ho
w d
o m
arin
e a
nim
als
ke
ep
th
eir c
ells
fro
m s
hrin
kin
g?
Ho
w d
o y
ou
ke
ep
yo
ur
blo
od
ce
lls f
rom
bu
rstin
g?
Bo
th o
f th
ese
qu
est
ion
s h
ave
to
do
with
th
e c
ell
me
mb
ran
e a
nd
osm
osi
s. M
arin
e a
nim
als
live
in
sa
lt w
ate
r, w
hic
h is
a h
yp
ert
on
ic
en
viro
nm
en
t; t
he
re is
mo
re s
alt in
th
e w
ate
r th
an
in
th
eir c
ells
. To
pre
ve
nt
losi
ng
to
o m
uc
h w
ate
r fr
om
th
eir b
od
ies,
th
ese
an
ima
ls
inta
ke
larg
e q
ua
ntitie
s o
f sa
lt w
ate
r a
nd
th
en
se
cre
te t
he
exc
ess
salt. R
ed
blo
od
ce
lls c
an
be
ke
pt
fro
m b
urs
tin
g o
r sh
rive
ling
if
pu
t in
a s
olu
tio
n t
ha
t is
iso
ton
ic t
o t
he
blo
od
ce
lls. If t
he
blo
od
ce
lls w
ere
pu
t in
pu
re w
ate
r, t
he
so
lutio
n w
ou
ld b
e h
yp
oto
nic
to
th
e b
loo
d
ce
lls, so
wa
ter
wo
uld
en
ter
the
blo
od
ce
lls, a
nd
th
ey w
ou
ld s
we
ll
an
d b
urs
t (F
igu
re b
elo
w).
Ad
ap
ted
fro
m:
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refe
rre
r=fe
atu
red
_c
on
ten
t
1. 2.
3. 4.
Read It!
Read It!
Read It! Read It!
How can a hypotonic
solution cause a cell to
rupture? Describe this
process as specifically as
you can.
If a plant cell is placed in a solution
and the cell shrivels up, what type
of solution was it placed in? How
do you know?
Describe the process
of diffusion.
Do water molecules
leave or enter a cell in
an isotonic solution?
1. 2.
3. 4.
Watch It!
Watch It!
Watch It! Watch It!
Go to the following Video:
http://tinyurl.com/ATbrainpop
How do transport proteins move
substances across membranes?
A. They move inside the membrane,
carrying the substance.
B. They change shape
C. They rip open a temporary hole in
the membrane
D. They increase the concentration
gradient inside the cell.
The cell membrane is semi-
permeable. What does permeable
mean?
A. Extremely thick
B. Extremely thin
C. Things can penetrate/get
through it
D. Able to be broken
What is the difference between active
and passive transport?
A. Active transport requires energy;
passive transport does not
B. Active transport moves molecules
across cell membranes; passive
transport does not
C. Active transport involves oxygen and
water molecules; passive transport
does not
5.
7. 8.
Watch It!
6.
Watch It!
Watch It! Watch It!
What might happen if the cell didn’t have any ATP?
A. It would not have enough energy to carry out
active transport.
B. Its transport proteins would be made of
carbohydrates instead.
C. Its cell membrane would no longer be semi-
permeable
D. Its concentration gradient would be steeper.
What can you infer about the
membrane of a vesicle or a
vacuole?
A. It is made out of transport
proteins.
B. It is made out of water molecules
C. It is made out of the same
substance as the cell membrane
D. It is made out of cellulose
If you were looking for transport
proteins, where would you find
them?
A. Inside a cell’s nucleus
B. Lodged within a cell’s
membrane
C. Inside a cell’s cytoplasm
D. Inside a cell’s endoplasmic
The natural spreading of particles
through a liquid or gas is called:
A. Dilution
B. Diffusion
C. Differentiation
D. Fusion
1. 2.
3. 4.
Explore It!
Explore It!
Explore It! Explore It!
The Osmosis Gizmo™: The red
square represents a cell a solution
of purple solute (like salt) particles
dissolved in green solvent (like
water) particles. Press Play and
observe. Answer the questions on
your Lab Sheet.
Go to the Osmosis Gizmo.
Follow the directions.
Go to the Diffusion
Gizmo. Follow the
directions:
Get the Gizmo ready:
Click Reset. Set the Initial cell volume
to 40%.
Observe: Use the Solute outside slider to
change the concentration of solute
particles outside the cell. Click Play.
In each case, focus on whether the
cell gets bigger or smaller.
Answer the questions on your lab sheet.
5. 6.
7. 8.
Explore It!
Explore It!
Explore It! Explore It!
Click Pause ( ), and select the
GRAPH tab. What does the graph
tell you about the number of
particles in region A? Answer the
question on your lab sheet.
Select the BAR CHART tab,
and observe the chart
for a few minutes.
Answer the question on
your Lab Sheet.
Smells are carried by tiny particles that
move through the air. The Diffusion
Gizmo™ shows gas particles in a
chamber that is divided into two
regions by a partial wall. Click Play
( ) and observe. Answer the
questions on your lab sheet.
Get the Gizmo ready:
Click Reset ( ).
Set the Wall to 100%.
Observe: Set the temperature
(Temp.) to 100 K, and press Play.
Observe the motion of particles.
Click Reset. Then set the
temperature to 600 K, click Play,
and observe.
1. 1.
Research It!
Illustrate It!
Draw a picture to represent
the meaning of each of the
following terms: osmosis,
diffusion and active
transport.
What are endocytosis
and exocytosis?
How are they
used in cells?
1.
Write It!
Scan the QR code to access your writing
prompt. Use C-E-R
to defend your
answer.
1.
Assess It!
Open the Socrative app or go to
socrative.com to complete the
assessment.
1.
Organize It!
Match each scenario
to the type of cellular
transport that is taking
place.
Osmosis
Diffusion
Active
Transport
Wa
ter
mo
ve
s o
ut
of
the
ce
lls o
f a
sa
ltw
ate
r fish
an
d in
to
the
oc
ea
n.
Oxyg
en
mo
ve
s fr
om
th
e lu
ng
s in
to t
he
b
loo
dst
rea
m.
So
diu
m is
pu
mp
ed
o
ut
of
a n
erv
e c
ell.
Y
ou
sm
ell
the
d
elic
iou
s sc
en
t o
f fr
esh
-ba
ke
d
co
okie
s b
efo
re
yo
u e
ve
n e
nte
r th
e k
itc
he
n.
An
am
oe
ba
e
ng
ulfs
a p
art
icle
o
f fo
od
.
Wa
ter
en
ters
th
e
roo
ts o
f p
lan
ts
fro
m t
he
so
il.
A ly
soso
me
dig
est
s fo
od
pa
rtic
les
an
d
the
n u
ses
exo
cyto
sis
to g
et
rid
of
wa
ste
.
Pa
rtic
les
tha
t a
re
too
big
pa
ss
thro
ug
h s
pe
cia
l
ca
rrie
r p
rote
ins
mo
vin
g f
rom
a h
igh
co
nc
en
tra
tio
n t
o a
low
co
nc
en
tra
tio
n
Hyd
rog
en
io
ns
are
pu
mp
ed
fro
m
an
are
a o
f lo
w
co
nc
en
tra
tio
n t
o
an
are
a o
f h
igh
co
nc
en
tra
tio
n.
Wa
ter
mo
ve
s fr
om
a
n a
rea
of
low
sa
lt
co
nc
en
tra
tio
n
tow
ard
s a
n a
rea
th
at
is m
ore
sa
lty.
The
diffu
sio
n o
f w
ate
r a
cro
ss a
se
lec
tiv
ely
p
erm
ea
ble
m
em
bra
ne
.
Re
qu
ire
s th
e
use
of
the
ce
ll’s
en
erg
y.
The
mo
ve
me
nt
of
pa
rtic
les
fro
m
are
a o
f lo
w
co
nc
en
tra
tio
n t
o
an
are
a o
f h
igh
er
co
nc
en
tra
tio
n.
Ro
ots
ce
lls
pu
mp
m
ine
rals
in
fro
m t
he
so
il.
Do
es
no
t re
qu
ire
th
e
ce
ll’s
en
erg
y.
So
me
on
e s
pra
ys
air f
resh
en
er
ac
ross
th
e r
oo
m
an
d e
ve
ntu
ally
yo
u c
an
sm
ell
it
ev
ery
wh
ere
.
Wh
at
is h
ap
pe
nin
g
with
th
e g
ree
n
pa
rtic
les
fro
m t
he
b
ott
le?
The
mo
ve
me
nt
of
pa
rtic
les
fro
m a
n a
rea
of
hig
h
co
nc
en
tra
tio
n t
o a
n a
rea
o
f lo
w
co
nc
en
tra
tio
n.
Wh
at
pro
ce
ss w
ou
ld h
elp
th
e v
ac
uo
les
refill
wh
en
yo
u w
ate
r th
e p
lan
t?
Input Stations
Explore It!
Task Card 2:
1. Which particles can pass through the cell membrane?
2. Which particles cannot pass through the cell membrane?
3. Click Reset ( ), and then click Play again. What do you notice
about the size of the cell?
Task Card 3:
1. In what situation does the cell get larger ?
2. In what situation does the cell get smaller?
Task Card 5:
1. Describe the motion of the gas particles:
2. Over time, what is happening?
Task Card 6:
1. After the first 30 seconds or so, how much do the numbers of
particles in each region change?
FACT: When the numbers don’t change much, the particles are said
to be in dynamic equilibrium.
Explore It!
Task Card 7:
1. What does the graph tell you about the number of
particles in region A?
Task Card 8:
1. How does the temperature of the gas relate to the motion of
the particles?
Read It!
Task Card 1:
Task Card 2:
Task Card 3:
Task Card 4:
Watch It!
Output Stations
Write It!
Use Claim, Evidence and Reasoning
Task Card 1:
Illustrate It!
Task Card 1:
Assess It! (See teacher for Socrative Code)
Organize It!
Reflection: How did you do? What did you find easy? What
mistakes did you make?
Teacher Initials:
___________2.
___________3.
___________4.
___________5.
___________6.
___________7.