NEET · Biology · STD 12 - 2. human reproduction
Which of these is not an important component of initiation of parturition in humans?
- A Release of oxytocin
- B Release of prolactin
- C Increase in estrogen and progesterone ratio
- D Synthesis of prostaglandins
Answer & Solution
Correct Answer
(B) Release of prolactin
Step-by-step Solution
Detailed explanation
(b) : Process of parturition is induced by both nervous system and hormones secreted by the endocrine glands of the mother. The signals for child birth (parturition) originate from the fully developed foetus and placenta which induce mild uterine contractions called foetal ejection reflex. This causes quick release of oxytocin from the maternal posterior lobe of pituitary gland which induces labour pains. Prostoglandins, progesterone and estrogen also play a role. Prolactin is the hormone which induces lactation and has no role in parturition.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Biology
- Match List \(I\) with List \(II\)
Choose the correct answer from the options given below:List \(I\) List \(II\) \(A\). Two or more alternative forms of a gene \(I\). Backcross \(B\). Cross of \(F_1\) progeny with homozygous recessive parents \(II\). ploidy \(C\). Cross of \(F_1\) progeny with any of the parents \(III\). Allele \(D\). Number of chromosome sets in plant \(IV\). Test cross NEET 2024 Medium - The partial pressure of oxygen in the alveoli of the lungs isNEET 2016 Medium
- The function of copper ions in copper releasing \(IUDs\) isNEET 2017 Medium
- Perigynous flowers are found inNEET 2015 Medium
- Given below are two statements : Statement \(I:\) DNA polymerases catalyse polymerisation only in one direction, that is \(5^{\prime} \rightarrow 3^{\prime}\) Statement \(II:\) During replication of \(DNA\), on one strand the replication is continuous while on other strand it is discontinuous. In the light of the above statements, choose the correct answer from the options given below :NEET 2022 Medium
- The protein portion of an enzyme is called _______.NEET 2025 Easy
More PYQs from NEET
- Find the emf of the cell in which the following reaction takes place at \(298 \,K\) (In \(V\)) \(Ni ( s )+2 Ag ^{+}(0.001 M ) \rightarrow Ni ^{2+}(0.001 M )+2 Ag ( s )\) \((\) Given that \(E _{\text {cell }}^{\circ}=10.5 \,V , \frac{2.303 RT }{ F }=0.059\) at \(298\, K )\)NEET 2022 Medium
- The most abundant intracellular cation isNEET 2013 Medium
- Animal vectors are required for pollination inNEET 2013 Medium
- Most animals that live in deep oceanic waters areNEET 2015 Medium
- Match the Column\(-I\) with Column\(-II\)
Choose the right match from options given belowColumn\(-I\) Column\(-II\) \((a)\) Golgi apparatus \((i)\) Synthesis of protein \((b)\) Lysosomes \((ii)\) Trap waste and excretory products \((c)\) Vacuoles \((iii)\) Formation of glycoproteins and glycolipids \((d)\) Ribosomes \((iv)\) Digesting biomolecules NEET 2019 Easy - Nuclear envelope is a derivative ofNEET 2015 Medium