Q166 / 200 · NEET 2010 (Screening) · Zoology

The signals for parturition originate from

  • A
    placenta only
  • Correct answer
    B
    placenta as well as fully developed foetus
  • C
    oxytocin released from maternal pituitary
  • D
    fully developed foetus only

Solution

The process of giving birth to a baby is called parturition. Parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta, which induce mild uterine contractions called foetal ejection reflex.

Hence, the correct answer is option: 'B'.

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