Endocytosis and exocytosis class 9 Biology in Urdu /in Hindi | Lec #27 | cells and tissues | chp#4 - video Dailymotion

Academy of biology 78

endocytosis and exocytosis class 9 biology in urdu endocytosis and exocytosis class 9 biology endocytosis class 9 biology biology class 9 chapter 4 endocytosis and exocytosis endocytosis and exocytosis class 9 biology class 9 chapter 1 biophysics class 9 biology endocytosis what is endocytosis and exocytosis class 9 endocytosis and exocytosis class 9 endocytosis and exocytosis difference between endocytosis and exocytosis endocytosis and exocytosis in hindi endocytosis endocytosis and exocytosis in urdu exocytosis exocytosis and endocytosis endocytosis and phagocytosis class 9 endocytosis and exocytosis class 9 biology endocytosis and exocytosis across the cell membrane endocytosis and exocytosis class 9th difference between endocytosis and exocytosis class 9 Pinocytosis #9thclassbiology  #class9biology #eLearning pk #Pk stories #Learn with dyed atif #Sreducators #Sair medical learning #Nextgene developer #impulse wave #TWC academy #Study malaria

Transcript

00:00Today our topic of discussion is endocytosis and exocytosis.

00:07First of all, let's see what is endocytosis?

00:13It is the process of cellular ingestion of bulky material by unfolding of cell membrane.

00:20Cellular ingestion means cells eat bulky material.

00:28Large sized particles are called bulky material.

00:34For example, here are some water molecules.

00:38Water molecules cannot be called bulky material because they are small in size.

00:46When many water molecules meet each other, they form droplets.

00:52A droplet of water can be called bulky material because it contains thousands of water molecules.

01:02Similarly, a solid particle can also be called bulky material.

01:10Bulky material can be solid or liquid.

01:14Endocytosis is a process in which cells ingest bulky material.

01:20Endocytosis is a process in which cells ingest bulky material by unfolding of cell membrane.

01:32Endocytosis is a process in which cells ingest bulky material by unfolding of cell membrane.

01:40What is the function of white blood cell in our body?

01:46When bacteria or viruses enter our body, white blood cells kill them.

01:56For example, we have a white blood cell and its outer covering is called cell membrane.

02:04For example, we have a white blood cell and its outer covering is called cell membrane.

02:10When these bacteria come in contact with the cell membrane, the cell membrane folds inward.

02:18When these bacteria come in contact with the cell membrane, the cell membrane folds inward.

02:24After that, these two ends join together.

02:30After that, these two ends join together.

02:34After that, these bulky materials enter the cytoplasm.

02:39After that, it separates itself from the membrane.

02:43After that, it separates itself from the membrane.

02:47And it is greeted with cells.

02:51And it is greeted with cells.

02:55So, this bacterial in the form of vesicle enters the cell membrane, sorry, inside the

03:05cell.

03:06And in the cytoplasm of the cell, lysosomes are present.

03:11This is a vesicle and digestive enzymes are present inside it, which break down things.

03:20So, here we have a bacteria.

03:23These are lysosomes.

03:25When they meet each other, as shown here, they are attached to each other.

03:32What you see in blue color, these are lysosomes.

03:36And in its center, you can see a structure.

03:40What is that?

03:42Bacteria.

03:43So, what do lysosomes do?

03:46They are attached to bacteria.

03:48After this, they release enzymes.

03:51And these enzymes break down the bacteria.

03:55After this, after breaking down, these things are taken out.

04:03Cytosomes, lysosomes.

04:05And the useful things are used by the cells.

04:09These are absorbed.

04:11And the waste material.

04:13During digestion, the waste material is formed.

04:17Cells close them in a membrane.

04:21They cover a membrane.

04:25After this, they come and join with the cell membrane wall.

04:32Okay, the waste material.

04:36The bacteria was absorbed by the cell in the form of a bulky material.

04:44Similarly, the waste material comes out of the cell in the form of a bulky material.

04:51So, the waste material is attached to the cell membrane wall.

04:58After this, the cell membrane wall opens up.

05:03After this, the waste material comes out of the cell.

05:10And with the bulky material, the membrane is attached to the cell membrane.

05:28So, we saw that in cellular endocytosis, the cells ingest the bulky material by enfolding the cell membrane.

05:38And when bacteria enter the cell, the process is called endocytosis.

05:47Endo means inside.

05:49Bacteria are entering the cell.

05:51After this, digestion occurs in the cell.

05:54And the process of the waste material coming out of the cell is called exocytosis.

06:01Entering the cell is called endocytosis.

06:04And the process of coming out of the cell is called exocytosis.

06:08So, these two are opposite to each other.

06:11After this, we see the types of endocytosis.

06:15There are two types of endocytosis.

06:17One is called phagocytosis.

06:19The other is called penocytosis.

06:21Phagocytosis means cellular eater.

06:23So, at the beginning of the lecture, we read that in endocytosis, the bulky material can be solid or liquid.

06:31Whenever the cell ingests a solid material, it is called phagocytosis.

06:40As shown here, the cell is ingesting the solid material.

06:46And penocytosis means cellular drinker.

06:50In penocytosis, the cell takes the liquid in the form of droplets.

06:57As shown here, the liquid is entering the cell in the form of droplets.

07:05In phagocytosis, solid material enters the cell.

07:09In penocytosis, liquid in the form of droplets enters the cell.

07:16Exocytosis means the process of excretion from the cell.

07:27So, through the process of endocytosis, the bulky material enters the cell.

07:33The waste material exits the cell through the process of exocytosis.

Endocytosis and exocytosis class 9 Biology in Urdu /in Hindi | Lec #27 | cells and tissues | chp#4

Category

Transcript

Recommended