Biology help needed. Please help .Exocytosis Endocytosis

[MariamHASAN]

can anyone write an answer to the question How endocytosis occurs at the cell surface membrane? How exocytosis occurs at the cell surface membrane? marks 4!

 

[scouserlfc]

can anyone write an answer to the question How endocytosis occurs at the cell surface membrane? How exocytosis occurs at the cell surface membrane? marks 4!

Exocytosis means the bulk movement of substances out of cells mainly in the normal cells after protein is formed or stuff ! the process involves first the particle to be moved should be trapped in a vacoule or vesicle then after its trapped it gets attached to the CSM,where by exocytosis the cell membrane causes these particles to be thrown out of the cell !
Endocytosis is the opposite of this and mainly occurs in cells like phagocytes or even unicellular organisms ! it involves first the trapping of the particle in a vacoule or vesicles,the invagination of the cell to form a cup shaped depression which pinches of to form a vacuole or vesicle in which it traps the particle. then it attaches itself to the CSM which engulfs the particle in it

Also read the whole of pg 64 and 65
http://books.google.com.pk/books?id...Bg&redir_esc=y#v=onepage&q=exocytosis&f=false

 

[MariamHASAN]

Thanks but do we need to write about protein receptors and antannae

 

[scouserlfc]

Thanks but do we need to write about protein receptors and antannae

I dont get what u are referring by antenna but no u dont need to write any of this check any recent Past paper Marking scheme for this question and u will get the idea