1.3 Cytosis Flashcards

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1
Q

why is cytosis needed

A

to transport large molecules
- enzymes
- antibodies
across cell membrane

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2
Q

name types of cytosis

A
  1. exocytosis
  2. endocytosis
    -(phagocytosis)
    -(pinocytosis)
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3
Q

why are they referred to as “bulk transport”

A

transport a large amount of material

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4
Q

what is endocytosis

A

large particles or molecules transported into the cell

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5
Q

explain the process of endocytosis

A
  • cell membrane folds inwards to form a cavity around particles (invagination)
  • membrane completely encircles the particles, ∴ forming a vesicle
  • vesicle moves into cell
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6
Q

what is phagocytosis

A

when solid material (bacteria) is taken into cell

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7
Q

what is pinocytosis

A

when fluid is taken into cell

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8
Q

what moves via exocytosis

A

(secreted proteins)
- hormones
- some enzymes

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9
Q

where are secreted proteins found at the start of endocytosis

A

golgi body (modified before secretion)

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10
Q

explain the process of exocytosis

A
  • vesicles containing protein BUD OFF of golgi, ∴ going to the cell membrane
  • vesicles FUSE with cell membrane
  • protein secreted
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11
Q

is cytosis a passive process?

A

no. it requires energy in the form of ATP

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12
Q
A
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