2.b.i - Intracellular Membranes

Question 1

eukaryotic cells have a system of ____ _____ called _____

Answer 1

internal membranes, endomembranes

Question 2

why do eukaryotic cells have a system of internal membranes

Answer 2

endomembranes increase the total area of membrane

Question 3

give 4 examples of endomembranes

Answer 3

endoplasmic reticulum (ER), Golgi apparatus, lysosomes, vesicles

Question 4

describe the function of the endoplasmic reticulum (ER)

Answer 4

the endoplasmic reticulum is a membrane system which forms a network of membrane tubules continuous with the nuclear membrane

Question 5

describe the function of Golgi apparatus

Answer 5

a series of flattened membrane discs which creates + produces lysosomes and transports lipids

Question 6

describe the function of lysosomes

Answer 6

membrane-bound organelles containing a variety of hydrolases that digest protiens, lipids, nucleic acids, and carbohydrates

Question 7

describe the function of vesicles

Answer 7

large organelles which transport materials between membrane compartments

Question 8

describe why small surface area to volume ratio is a problem for eukaryotes

Answer 8

the plasma membrane of eukaryotic cells is too small an area to carry out all the vital functions carried out by membranes