7.8

Question 1

Membrane trafficking

Answer 1

Formation and movement of vesicles. requires ATP

Question 2

Basic steps of endocytosis

Answer 2

• The Plasma membrane folds inwards and creates a pocket for whatever molecules is being transported.

-The vesicle is pinched off of the cell membrane and into the cell

Question 3

Endocytosis

Answer 3

The process of removing parts of the cell membrane and turning it into vesicles in order to transport molecules and proteins into the cell

Question 4

Phagocytosis

Answer 4

A form of endocytosis where a cell membrane engulfs a large particle and degrades and releases into the cell

Question 5

Phagocytosis steps

Answer 5

1. Large particles become attached to the membrane
2. particles are ingested and become a phagosome
3. The phagosome fuses with lysosomes
4. The enzymes from the lysosomes digest the particles
5. The digested materials are releases from the cell

Question 6

Pinocytosis

Answer 6

“fluid based endocytosis” Basic endocytosis, a continual process in all cells where liquid is captured by the cell membrane and taken into the cell by vesicles

Question 7

Receptor mediated endocytosis

Answer 7

The targeting or specific proteins for endocytosis.

Question 8

How are receptors for receptor mediated endocytosis formed

Answer 8

Receptors are synthesized by the endoplasmic reticulum and sent to the golgi apparatus where it is sent to the membrane.

Question 9

Steps of receptor mediated endocytosis

Answer 9

• The molecule wanted by the receptor binds to it
  -The molecule moves through the membrane to the clatherine coated pit
  -The pit forms a vesicle, engulfing the receptor and molecules
• The vesicles form with endosomes in the cell and release the coating
  -The receptor is separated and transported back to the membrane
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