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A : Corticotrophin releasing hormone ...

A : Corticotrophin releasing hormone is a a part of the clock that establishes the timing of birth .
R : The signals for parturition originate from the fully developed foetus and placenta which induce mild uterine contractions called foetal ejection reflex .

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)

C

If Assertion is true statement but Reason is false then mark (3)

D

If both Assertion and Reason are false statement then Mark (4)

Text Solution

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The correct Answer is:
B
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Signals for parturition originate from

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The signals for parturition originate from the fully developed foetus only. (True/false)

Read following statements (a-d) and choose the option with only correct statements. a. Parturition occurs due to a complex neuroendocrine mechanism at the end of gestation period. b. The signals for parturition originate from fully developed foetus and placenta which induces mild uterine contraction. c. Foetal ejection reflex triggers release of oxytocin from foetal pituitary. d. Oxytocin reduces uterine contraction under positive feedback control and causes expulsion of placenta followed by foetus known as parturition. a and b b and c c and d a and d

AAKASH INSTITUTE-HUMAN REPRODUCTION-Assignment ( Section - D ) (Assertion - Reason Type Question ) (In the following question a statement of assertion (A) is followed by a statement of reason (R )
  1. A : placenta is connected to the embryo through an umbilical cor...

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  2. A : All copulations do not lead to fertilisation and pregnancy ....

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  3. A : Lack of menstruation may be indicative of pregnancy R : ...

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  4. A : LH acts on Sertolic cells for release of certain factors re...

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  5. A : The first sign of growing foetus may be noticed by listeni...

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  6. A: Leyding 's cells synthesise and secrete festicular hormones ca...

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  7. A : In spermatogenesis the first haploid forms are spermatids. R...

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  8. A : Presence or absence of hymen is not a reliable inducator of v...

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  9. A : After menopause the levels of blood gonadotropins will rise ...

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  10. A : The secretions of male accessory glands constitute the semi...

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  11. A : Corpus luteum begins to atrophy after a short life of 10 to ...

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  12. A : Most birds posses only the left ovary and left oviduct for...

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  13. A : The most immediate effect of FSH is the maturation of exis...

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  14. A : The morula passes through the phase of compaction produces ...

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  15. A : Developments is the emergence of a multicellular organism f...

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  16. A : Synthesis of milk is stimulated by rise in the level of ox...

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  17. A : Blastocyst undergoes gastrulation to produce the three germinal...

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  18. A : The scrotum acts as temperature regulator for the testes ...

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  19. A : Fertilin protein is present in the egg membrane R : it help...

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  20. A : Corticotrophin releasing hormone is a a part of the clock ...

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