All are true regarding Prostaglandins except:

A. LT cause vasoconstriction and decreased vascular permeability

B. 20 carbon unsaturated fats

C. Prostacyclin inhibits platelet aggregation

D. Prostaglandins cause uterine muscle contraction & induce labor

Correct Answer: LT cause vasoconstriction and decreased vascular permeability

Description: Ans-ARef: Harpers illustrated Biochemistry,28th editionExplanation:Synthesis from arachidonate (See figure on the next page)FUNCTIONSProstacyclin (PGI2)Inhibit platelet aggregationVasodilatationPGF:Uterine muscle contractionInduce laborBronchoconstrictorPGE:BronchodilatorCauses inflammationThromboxaneSynthesis: plateletFunction: platelet aggregationAspirin - Inhibits TXA2 - | Platelet aggregationAspirin is used in the treatment of myocardial infarctionLeukotrienesThe site of synthesis: leukocytes, platelets, macrophagesSlow reacting substance (SRS-A)Leukotrienes-C, D, EFunctions: InflammationVasoconstrictionBronchoconstriction

Category: Unknown

Share:

← Previous MCQ

Next MCQ →

Get More

Subject Mock Tests

Practice with over 200,000 questions from various medical subjects and improve your knowledge.

Attempt a mock test now

Mock Exam

Take an exam with 100 random questions selected from all subjects to test your knowledge.

Coming Soon

Get More

Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now

Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon