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Exocytosis is the long lasting process by which
a cell directs the contents of secretory vesicles
(small bubble of liquid within a cell) out of the
cell membrane. The vesicles in membrane-
bound contains soluble proteins to be
secreted to the outer environment, as well as
membrane proteins and lipids that are sent to
become components of the cell membrane.…read more

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Exocytosis is the transportation of material out of the cell.
This transport is possible due to the fact that membranes can easily
fuse and separate.
Like active transport, bulk transport also requires energy in the form of
In this exocytosis transport the energy required from ATP is used to move
the membrane around to form the vesicles that are needed and to move
the vesicles around the cell as well.…read more

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In multicellular organisms there are two types of exocytosis
1) Ca2+ triggered non-constitutive
2) non Ca2+ triggered constitutive
Exocytosis in neuronal chemical synapses is Ca2+ triggered and sends
signals between the neurons. Constitutive exocytosis is performed by all
cells and serves the release of components of the extracellular metrix or
just delivery of newly-synthesized membrane proteins that are formed or
united as a whole in the plasma membrane after the fusion of the
transport vesicle. Exocytosis is the opposite of endocytosis.…read more

Slide 5

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Is the reverse of Endocytosis.
in the discharge of
the material from
vesicles at the cell
surface to the out
side of the cell.…read more

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1 2
The vesicle The
membranes fuses phospholipids
with the plasma regions of the 2
membrane. This membranes
is created by merge and
binding of the develop an
proteins from opening to the
each side. outside of the
The contents of
the vesicle are
released to the
environment and
the vesicle
membrane is
incorporated into
the plasma
membrane.…read more

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