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[A] : Prostaglandins are hormone like mo...

[A] : Prostaglandins are hormone like mol- ecules produced by many body cells of mam- mals
[R]: Prostaglandins stimulates contraction of smooth muscles, secretion and piatelet ag- gregation.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

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The correct Answer is:
B
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Go through the following statements (i) HCG from placenta stimulates the sertoli cells of the male foetus to produce testosterone and is thus indirectly ivolved in the development of male external genitalia (ii) Sertoli cells secrete a protein called inhibin, which suppresses FSH synthesis. (iii) Humans have haemo-endothelial type of placenta. (iv) oxytcin stimulates the placenta to secrete prostaglandins which in turn stimulate more contractions of uterus. Which of these correct?

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  5. [A] : Testes are attached to abdominal wall by a ligament and under te...

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  10. [A] : Molecules of fatty acid, glycerol, sugars and amino acids are ab...

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  11. [A] : Vitamins, A, D, E and K dissolve in fat and are absorbed with fa...

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  12. [A] : Vitamins A, D, E and K are fat soluble while vitamin B complex ...

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  13. [A] : In lower invertebrates the digestion is intracellular while in h...

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  14. [A] : Pancreas is the second largest of the di- gestive glands. [R]...

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  16. [A] : Blood plasma is the slightly alkaline, liv- ing intercellular m...

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  17. [A]: When platelets disintegrate, 5-hydroxy tryptamine and histamine a...

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  18. [A] : Blood platelets play a very important role in coagulation of bl...

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  19. [A]: Prothrombin is necessory for blood clot- ting. , [R]: This is...

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  20. [A] : In frog skull is dicondyiic. [R]: Skull articulates with the...

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