Section 7.5 Cell Systems II: Endomembrane System

The Endomembrane System

Manufactures, ships, and Recycled/used

The Endomembrane System step 1

protein enters ER

The Endomembrane System step 2

proteins exits the ER

The Endomembrane System step 3

protein enters Golgi apparatus

The Endomembrane System step 4

protein exits Golgi apparatus

The Endomembrane System step 5

protein is secreted from the cell

What Happens Inside the Golgi Apparatus?

Proteins are transported in vesicles

how are proteins transported

budding off the ER

what does the vesical fuse with

cis face

what does Proteins transported into the vesicle dump in the Golgi Apparatus

cargo “cells'“

New cisternae form at

cis face

Old cisternae break off from the

trans face

what are the old cisternae replaced by

cisternae behind them

Different cisternae contain different

enzymes

Proteins are modified as they

move through

Each protein that comes out of the Golgi apparatus has

molecular tag

molecular tags place proteins with

particular type of transport vesicle

Each type of transport vesicle also has a tag that allows

it to be transported to the correct destination

Large molecules must be digested by ? before their monomers can be used by the cell

lysosomes

3 pathways of lysosomes

Receptor mediated, Phagocytosis, Autophagy

​Receptor-mediated endocytosis

Particles bind to receptors on the plasma membrane (based on the particles)

in what are Plasma membrane pinches off to form a vesicle

​Receptor-mediated endocytosis

what Recycling Material in the Lysosome uses Vesicle fuses with an early endosome and proton pumps lower pH; receptor

Receptor-mediated endocytosis

Vesicles matures into a lysosome in

​Receptor-mediated endocytosis

Phagocytosis (“eat-cell-act”)

Plasma membrane engulfs a smaller cell or food particle

what forms because of Phagocytosis

phagosome

what do phagosome fuse with

lysosome

Phagocytosis Materials are taken

in and digested

Autophagy (“same-eating”)

Fuses with a lysosome for digestion

Autophagosome forms

around structure inside the cell