Final answer:
The second family of autacoids, which consists of modified phospholipids, is represented by the platelet-activating factor (PAF). The option (E) is correct.
Step-by-step explanation:
Two distinct families of autacoids derived from membrane phospholipids play significant roles throughout the body. The first family, the eicosanoids, includes compounds such as prostaglandins, prostacyclin, thromboxane A2, and leukotrienes.
These are synthesized from polyunsaturated fatty acids like arachidonic acid and play roles in various physiological functions including inflammation, blood clotting, and regulation of blood pressure. The second family of autacoids consists of modified phospholipids, and the representative molecule for this family is the platelet-activating factor (PAF). Therefore, option (E) is correct.
This question is not complete, Here I am attaching the complete question:
2 distinct families of autacoids that are derived from membrane phospholipids have been identified. The actions of these molecules can be manifest in virtually every organ and tissue of the body. The first family is the eicosanoids, which are formed from certain polyunsaturated fatty acids. The eicosanoid family includes the prostaglandins, prostacyclin, thromboxane A2, and leukotrienes. The second family of autacoids consists of modified phospholipids, currently represented by what?
(A) MBL
(B) Mac-1
(C) SDF-1
(D) TLR
(E) PAF