Cell biology / nursing access course - please help

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Chloemin
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#1
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#1
hello !

im hoping some can help me,

im stuck on a questions - describe how endocytosis and exocytosis are used to move things into and out of cells .

any help would me greatly appreciated
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JA_1
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#2
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Endocytosis and exocytosis are forms of bulk transport which move substances in and out of cells. Endo/exo cytosis are used where the molecules being moved into/out of the cell are too large, or in too large quantities, to be moved simply by diffusion across the cell membrane. Both are forms of active transport as they require energy.

In endocytosis, the cell membrane engulfs the material being transported, to create a vesicle. The vesicle (containing the molecules being transported) is then released into the cell.

In exocytosis, vesicles which contain substances (eg insulin) fuse with the cell membrane to release the contents on the other side- and out of cells.

Endocytosis therefore takes substances into a cell whereas exocytosis brings substances out of the cell.

Hope that helps
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Chloemin
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#3
Report Thread starter 1 year ago
#3
(Original post by JA_1)
Endocytosis and exocytosis are forms of bulk transport which move substances in and out of cells. Endo/exo cytosis are used where the molecules being moved into/out of the cell are too large, or in too large quantities, to be moved simply by diffusion across the cell membrane. Both are forms of active transport as they require energy.

In endocytosis, the cell membrane engulfs the material being transported, to create a vesicle. The vesicle (containing the molecules being transported) is then released into the cell.

In exocytosis, vesicles which contain substances (eg insulin) fuse with the cell membrane to release the contents on the other side- and out of cells.

Endocytosis therefore takes substances into a cell whereas exocytosis brings substances out of the cell.

Hope that helps
thank you sooooooo much!!!!!
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