Download membrane transport

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

page
1
page
2
page
3
page
4
page
5
page
6
page
7
page
8
page
9
page
10
page
11
page
12
page
13
page
14
page
15
page
16
page
17
page
18
page
19
page
20
page
21
page
22
page
23
page
24
page
25
page
26
page
27
page
28
page
29
page
30
page
31
page
32
page
33
page
34
page
35
page
36
page
37
page
38
page
39
page
40
Document related concepts
no text concepts found
Transcript 
MEMBRANE STRUCTURE AND
FUNCTION
Label the structure of the cell
membrane
Phospholipid
Label the cell membrane
Functions of the phospholipids and
carbohydrates
Phospholipids:
Carbohydrates:
Functions of membrane proteins
MEMBRANE TRANSPORT
Simple Diffusion
Definition:
What is the energy source of the diffusion?
Is it an active or passive transport?
What are the factors that affect
diffusion rate:
1- the concentration gradient
2- temperature
3- size of the molecule
4- charge of the molecule
5- lipid solubility of the molecule
Diffusion of solvent
Hypertonic solution:
Hypotonic solution:
Isotonic solutions:
Transport across membranes
1. Simple diffusion
2. Transport with a
protein
Diffusion of solute
Facilitated diffusion
Diffusion of solvent
Active transport
3. Transportation
of large molecules
(bulk transport)
Endocytosis
Exocytosis
Plasmolysis:
Deplasmolysis:
Osmotic pressure: the tendency of a
solution to take up water
Turgor pressure: the force applied to
a cell wall after the swelling of the cell
.
What is the water balance
problem of the cells which do
not have cell wall?
What is the water balance
problem of the cells which have
cell wall?
Facilitated Diffusion
Fig. 5.6
Solute
molecule
Transport
protein
Facilitated Diffusion 1
Definition:
Does not require ATP
Which molecules are transported by
facilitated diffusion?
Fig. 5.8
Transport
protein
Protein
changes shape
Solute
1 Solute binding
2 Phosphorylation
3 Transport
Phosphate
detaches
4 Protein reversion
Active Transport 1
Definition:
• Which one is passive
transport?
Exocytosis
The cell secretes
macromolecules by the fusion of
vesicles with the plasma
membrane
This process is called exocytosis
Endocytosis
In endocytosis,
the cell takes macromolecules
and particulate matter by
forming new vesicles from
plasma membrane.
There are two types of
endocytosis:
1. Phagocytosis
2. Pinocytosis
Active transport animation
In phagocytosis,
a. the cell engulfs a particle by
wrapping pseudopodia (false feet)
around it
b. And packages the particle within
a membrane- enclosed sac
WBC, amoeba
In pinocytosis,
the cell ‘gulps’ droplets of
extracellular fluid into tiny
vesicles
Fig. 5.9
Related documents