MCQ
The foetal ejection reflex in humans triggers the release of
- Aoxytocin from foetal pituitary
- Bhuman chorionic gonadotropin $(hCG)$ from placenta
- Chuman placental lactogen $(hPL)$ from placenta
- ✓oxytocin from maternal pituitary.
✓
Answer
Correct option: D.
oxytocin from maternal pituitary.
d
(d) : 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. This triggers release of oxytocin from the maternal pituitary. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin. The stimulatory reflex between the uterine contraction and oxytocin secretion continues resulting in stronger and stronger contractions. This lead to expulsion of the baby out of the uterus through the birth canal.
(d) : 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. This triggers release of oxytocin from the maternal pituitary. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin. The stimulatory reflex between the uterine contraction and oxytocin secretion continues resulting in stronger and stronger contractions. This lead to expulsion of the baby out of the uterus through the birth canal.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The existence of marsupials in Australia and New Zealand prove:
The factor responsible for cirrhosis of liver is
The process of mineralisation by micro organisms helps in the release of:
$A$ : Crossing over is exchange of genetic material between non-homologous chromosomes.
$R$ : It produces new linkages.
→$R$ : It produces new linkages.
Raw material for decomposition represented by dead organic matter is
In a dihybrid cross $80$ plants are obtained. The ratio of homozygous and heterozygous shall be
→A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations $A$ and $B$ twenty years apart. Select the correct interpretation about them.
→Nitrogen fixation is performed by:
Test tube baby means a baby born when:
Which one of the following is commonly used in transfer of foreign $DNA$ into crop plants?
→