Mod 7 Flashcards
Surface Area
total amount of area of the outer surface of an object
Highlights the large amount of internal membrane in eukaryotes
What is called organelles
Internal membranes define Subcellular compartments
Are organelles connected with one anotehr
YES
How are organelles connect to each other
membrane bridges or temporarily connected by vesicles
Vesicles
Small membrane-enclosed sacs that transport substances within the cell to the exterior of the cell
How do vesicles form
By budding from an organelle, taking a piece of the membrane and internal contents of the organelle from where they derive with them
What happens after vesicles leave a cell
The fuse with another organelle of the cell membrane to reform a continuous membrane and unload contents.
What makes of the Endomembrane system
the interconnected membranes
What is the endomembrane system
Includes the cell membrane, nuclear envelope, endoplasmic reticulum, Golgi apparatus, lysosomes, and the vesicles that move between them.
Where is the Endomembrane continuous and how
In plants between cells throgh intercellular connections
What and how does the Endomembrane system divide the cell into 2
divides the interior of a cell into 2 spaces one inside the compartments defined by these membranes and one outside these compartments.
Nuclear Envelope
defines the boundary of the nucleus
How many membranes does the nuclear envelope have
2- one inner and one outer
EACH CONSIST OF A LIPID BYLAYER
Nuclear Pores
Large protein complexes with an inner passageway that regular which molecules go into and out of the nucleus
The transfer of information encoded by DNA depends on
The movement of RNA in and out of nuclear pores
Endoplasmic Reticulum
Involved in the production of proteins and lipids
Bounded by a single membrane and produces and transports many off the proteins and lipids inside and out the cell
The outer membrane of the nuclear envelope is continuous with what structure
The endoplasmic reticulum
ER is the sight of production of
Most lipids that make up various cell membranes
Lumen
The interior of ER that is continuous throughout
Complex network of interconnected tubules and flattened sacs
Where do proteins synthesized in rough ER end up
Can stay as TRANSMEMBRANE PROTEINS
Golgi Apparatus
Modifies and sorts proteins and lipids produced by E=
How many primary folds does teh GA have
3 primary folds
Cisternae
Flattened membrane sacs
Surrounded by numerous vesicles between the various cisternae
