Application of knowledge about semi permeable membrane class 9 Biology | Lec #24 | cells and tissue
application of knowledge about semi-permeable membranes
application of knowledge about semi-permeable membranes
In Urdu
application of knowledge about semi-permeable membranes
In Hindi
semi permeable membrane
application of knowledge about semi permeable membrane
4.3.5: application of knowledge about semi permeable membranes
cell membrane class 9
function of cell membrane
plasma membrane
semi permeable membrane in hindi
selectively permeable membrane
class 9 biology,cell membrane
structure of cell membrane
what is semi permeable membrane?
cell membrane class 11
permeable membrane in hindi
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application of knowledge about semi-permeable membranes
In Urdu
application of knowledge about semi-permeable membranes
In Hindi
semi permeable membrane
application of knowledge about semi permeable membrane
4.3.5: application of knowledge about semi permeable membranes
cell membrane class 9
function of cell membrane
plasma membrane
semi permeable membrane in hindi
selectively permeable membrane
class 9 biology,cell membrane
structure of cell membrane
what is semi permeable membrane?
cell membrane class 11
permeable membrane in hindi
#9thclassbiology
#class9biology
#eLearning pk,
#Pk stories,
#Learn with dyed atif,
#Sreducators,
#Sair medical learning,
#Nextgene developer,
#impulse wave,
#TWC academy,
#Study malaria,
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LearningTranscript
00:00Assalamu Alaikum, today our topic of discussion is application of knowledge about semipermeable
00:09membrane.
00:10We all know about semipermeable membrane, the outermost covering of an animal's cell
00:25membrane or plant's outermost covering is called cell wall, inside the cell wall, there
00:33is another membrane which is called cell membrane and it acts as a semipermeable membrane.
00:39Some substances are allowed to enter the cell and some are not allowed to enter the cell.
00:47So, scientists have made artificial semipermeable membrane by observing the phenomena of semipermeable
00:54membrane, which they use to separate different substances.
01:01For example, bacteria and virus are separated through semipermeable membrane, as bacteria
01:08are of large size and virus are of small size, they are separated through semipermeable membrane.
01:21Similarly, bacteria and virus are separated through semipermeable membrane, as bacteria
01:28are of large size and virus are of small size, they are separated through semipermeable membrane.
01:42For example, we make tea everyday, so how do we separate tea leaves from tea?
01:50To separate tea leaves, we use a sieve.
01:55Tea leaves are thick whereas tea molecules are small, so tea molecules can be easily
02:05separated through the sieve.
02:09Tea leaves are thick, so tea molecules can be easily separated through the sieve.
02:18This is just an example to make you understand.
02:22So, in this way, we can easily separate tea from tea leaves.
02:26So, in this way, scientists use semipermeable membrane to separate bacteria from virus.
02:33So, in this way, we use semipermeable membrane in water filtration system.
02:41So, in this way, we use semipermeable membrane in water filtration system.
02:49What is osmosis?
02:51Osmosis is the movement of water from low solute concentration to high solute concentration
02:58through semipermeable membrane.
03:03This is called osmosis.
03:05In the phenomenon of osmosis, water moves from low solute concentration to high solute
03:12concentration through semipermeable membrane.
03:15For example, this is semipermeable membrane which is yellow.
03:21On the left side, salute concentration is low.
03:25On the right side, salute concentration is high.
03:29So, in the process of osmosis, water moves from low solute concentration to high solute
03:36concentration.
03:38In reverse osmosis, water moves from low solute concentration to high solute concentration.
03:44In reverse osmosis, water moves from low solute concentration to high solute concentration.
03:50But how?
03:52In reverse osmosis, pressure is applied on water.
03:58Due to this, water moves from high solute concentration to low solute concentration
04:05due to external pressure.
04:09For example, this is semipermeable membrane.
04:12This is fresh water.
04:14Salute concentration is low in fresh water.
04:17Salute concentration is high in seawater.
04:20To make seawater drinkable, it is filtered through reverse osmosis.
04:29When pressure is applied, only water molecules pass through semipermeable membrane.
04:37While other things like dirt, salt, bacteria and viruses do not pass through the membrane.
04:48To make seawater drinkable, it is filtered through reverse osmosis.
04:55In this way, scientists have made artificial semipermeable membrane
05:01based on semipermeable membrane phenomenon.
05:04And they use it for different purposes.