Endoplasmic Reticulum

Question 1

What is the endoplasmic reticulum?

Answer 1

an extension of the outer membrane of the nucleus

Question 2

What are the two most common mentioned ER?

Answer 2

rough ER and smooth ER

Question 3

Define: CER

Answer 3

cortical ER, it is toward the outside and has a function in cell signalling

Question 4

Define: TER

Answer 4

transitional ER, breaks up into individual vesicles

Question 5

Define: SER

Answer 5

smooth ER, where the synthesis of lipids occur

Question 6

Define: RER

Answer 6

ribosomes cover the surface of the rough ER, where the synthesis of protein occurs

Question 7

Approximately how many domains are there?

Answer 7

17 domains

Question 8

What are the major functions of the ER?

Answer 8

support, transport channel, storage, and synthesis

Question 9

Which membranes are not made in the ER?

Answer 9

membranes from the mitochondria and chloroplast

Question 10

Define: cisternae

Answer 10

a flattened membrane sac

Question 11

Where is the lumen located?

Answer 11

inside the cisternae

Question 12

All secretory proteins in the lumen are…

Answer 12

hydrophilic

Question 13

The lipid solvent system is organized in series of _____

Answer 13

membranes

Question 14

The water solvent system is organized by _________

Answer 14

skeleton proteins

Question 15

Microfilaments are

Answer 15

actin

Question 16

Microtubules are made from

Answer 16

alpha and beta tubules

Question 17

An important intermediate filament is

Answer 17

keratin

Question 18

Microtubules are _______ tubes that are ____ in diameter

Answer 18

hollow; 25 nm

Question 19

Microfilaments are usually 2 twisted ______ and about _____ in diameter

Answer 19

actin filaments; 7 nm

Question 20

Intermediate filaments are about _____ in diameter and made up of ____

Answer 20

10 nm; keratin

Question 21

Intermediate filaments gives ______ to the cell

Answer 21

rigidity

Question 22

The intermediate begins in the nucleus, making it a _______

Answer 22

nucleoskeleton

Question 23

The intermediate cell stresses from ____ to ______

Answer 23

DNA to the extracellular matrix