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Question 1

vesicular transport

Answer 1

For large polar molecules (e.g. protein hormones secreted by endocrine
cells) and multi-molecular materials (e.g. bacteria ingested by white
blood cells) to enter and leave the cell
* Requires energy expenditure by the cell Active mechanism of
transport
* This energy is needed to accomplish vesicle formation and
movement within the cell

Question 2

Two forms of active transport:

Answer 2

• Endocytosis: three forms depending on the material internalized.
• Pinocytosis
• receptor-mediated endocytosis
• phagocytosis
• Exocytosis
  these fuse with lysosome except exocytosis

Question 3

pinocytosis

Answer 3

nonselective uptake of a sample of ECF) = “cell drinking
Macropinocytosis = large gulps of fluid

Question 4

receptor-mediated endocytosis

Answer 4

receptor-mediated endocytosis (selective uptake of a large molecule)

Question 5

phagocytosis

Answer 5

phagocytosis (selective uptake of a multimolecular particle) = “cell eating”
Unlike pinocytosis and receptor
mediated endocytosis, only certain
specialized cells can perform
phagocytosis

Question 6

Exocytosis

Answer 6

Almost the reverse of endocytosis (NO fusion with lysosomes)
* Two purposes:
* Secretion of large polar molecules (i.e., hormones or enzymes)
* Addition of components to membrane (i.e., channels or receptors)

Question 7

exocytosis docking..

Answer 7

Docking Marker on vesicle
docking-marker acceptor on
plasma membrane
(v-SNARE t-SNARE)
“Lock-and-key