Summary
Summary AQA ALEVEL BIOLOGY NOTES ON OSMOSIS
- Module
- Unit 2 - Cells
- Institution
- AQA
ALEVEL NOTES ON THE CELL TRANSPORT TOPIC- OSMOSIS ADJUSTED TO THE AQA SPECIFICATION AND MADE FROM MARKSCHEMES
[Show more]
Seller
Follow
Content preview
Osmosis|
→
from of
Osmosis is the movement of water an area
high
.
. water potential to an area of low water
potential
.
I membrane
'
a-
.
'
across a semi -
permeable .
"
demonised of
Only water has water potential OK7A
. '
.
pure a
.
•
,
.
-
/
water has water
Any dissolved
-
I
- .
.
-
solution with a
/
)
i -
I
'
I
potential L 0 kPa
-
I -
.
.
<
I solution )
.
i
"
-
The solute that is added ( i.e the more concentrated a the
-
, more ,
,
lower ( negative ) potential
'
more water .
H
0 H I
"
✓
t' ←
You cannot
-100hPa I I ions
-
o move
0Pa it H ti O t
CI without water
' -
High water Low water oft, t
'
o
Na
o
-
moving .
I /
potential
-
H
potential
H H
I
-
µ
0 H
Pure Water 4=0 kPa 4 -2004Pa Concentrated solution 4 =
-5004Pa
Dilute solution =
I 1 a 0
0 0 00 8 O O o
080 I o o
o o I o o
o
o
o oo § 0
• o
O O o p p 0 00
°
I O
O o
I
8 o or o o
o
O u 00 o
0 0
° ° 0
o 1 °
I o 0
0
000 0
°
0 0 000 000
• a
1 O
o
0
0 I 0
0000
0
00 000 a 00
°
I
0 I ° 0000 0
O O
O o O O
I
o I
°
go
0
000 0 80 0
⑨ 00
°
0 1 I 0
000 0
go
\ I
- -
water diffuses water diffuses
from -200Pa to
from 0hPa to -2004Pa
-5004Pa
I 1
Example :
"
Lumen of 1 '
Epithelial cell I
-
Bloodstream
I 1
digestive system 1 I
1 I
I
\
Mid root hair cell Top root hair cell
.
Root hair cell I
-
- -
-
1
I
Difference in water Potential
,1 11 TITLE -l -←
It
Iso tonic solution "
solution of equal water
potential to cell (
strength )
• "
a a same
Hyper tonic solution solution of lower
high strength 's
"
potential 1
✓
-
a water than a cell
= =
Hypotonia of higher strength )
''
potential
"
•
solution a
solution water than a cell L low
= =
Hyper tonic Is tonic Hypotonia
4 of
extenuation
solution
compared
more
negative Equal less
negative
to
cell
No Bursts
state shrinks change swells &
①
Holy
%
①
HL0
)
Cremation esneise.fi?Iysscaisneo
hae.no/ysisin0smoIysisL
( shrinks)
red blood cells
( Bursts )
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller talhaahmed360. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now