Phospholipids

Question 1

Phospholipids are not amphipathic. T/F

Answer 1

False

Phospholipids are amphipathic

Question 2

Phospholipids are composed of?

Answer 2

alcohol attached by phosphodiester bridge to diacylglycerol or sphingosine

Question 3

phospholipids are polar or non polar?

Answer 3

polar

Question 4

phospholipids are _____ ____ _____ and play a role in generation of ______ ____ _____.

Answer 4

structural components of membranes

lipid signaling molecules

Question 5

__________is important in the formation of myelin in nerve fibers.

Answer 5

sphingomyelin

sphingosine backbone instead of glycerol

Question 6

Dipalmitoyl-phosphatidylcholine DPPC is important for what?

Answer 6

major lipid component for surfactant synthesized and secreted by type 2 pneumocytes

Question 7

an important phospholipid that contains arachidonic acid is?

Answer 7

phosphatidylinositol

Question 8

arachidonic acid is important for?

Answer 8

prostanoid synthesis

Question 9

What pathway activates phosphatidylinositol, IP3, DAG

Answer 9

Gq, A1, epi

Question 10

important for signal cascade

Answer 10

phosphatidylinositol

Question 11

phosphatidylinositol plays an important role in membrane

Answer 11

protein anchoring

Question 12

phosphatidylinositol plays an important role in membrane protein anchoring of _____ and ______

Answer 12

• alkaline phosphatase (digestive enzyme) in small intestine
• acetylcholine esterase

Question 13

phosphatidylinositol can be cleaved by______to release ______

Answer 13

phospholipase C

diacylglycerol

Question 14

Phospholipid A2 is inhibited by

Answer 14

glucocorticoids

Question 15

phospholipid A2 acts on phosphatidylinositol releasing_____

Answer 15

arachidonic acid

Question 16

Membrane bound phospholipase C is activated by pip2 and plays an important role in_____

Answer 16

producing second messengers

Question 17

Phosphatidylinositol can be cleaved from its anchor by ______ releasing _____

Answer 17

PLC

diacylglycerol