Stimulation of uterine contraction during child birth is brought about by :-a)Adrenalineb)Progesteronec)Oxytocind)ProlactinCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Option C is correct, because I will eliminate one by one option adrenaline (emrgency hormones, Fight or flight hormone) it plays major role in emergency conditions, progesterone maintains corps lutium, prolactin helps in milk formation, oxytosin is stimulats strong contractions of myometrium muscles during the child birth and also helps in milk ejection...

Answer

Stimulation of uterine contraction during childbirth is a complex neuroendocrine reflex....
It is bought about by signals from fully developed embryo and placenta...the signals of parturition originate from the hypothalamus which stimulates pars nervosa of pituitary gland to release oxytocin hormone that helps in contraction of the uterine muscles leading to parturition...this entire mechanism is the positive feedback system of the body as instead of the oxytocin hormone concentration decreasing in our body it increases which helps in further dilation of the cervix and vagina....

Answer

Oxytocin is also called love hormone.. it contracts the smooth muscles  (uterus and breast)  involved in key aspects they are child birth and lactation..

Answer

When contractions of uterus starts oxytocin is released , which stimulate more contraction . Oxytocin causes contractions during  second and third stages of labour .

Answer

Stimulation of uterine contraction during child birth is brought about by oxytocin.

Introduction:
Childbirth, also known as labor and delivery, is the process by which a baby is born. It involves a series of complex physiological changes in the mother's body, including the stimulation of uterine contractions. These contractions help to push the baby through the birth canal and eventually lead to the delivery.

Oxytocin:
Oxytocin is a hormone that plays a crucial role in childbirth. It is produced by the hypothalamus and released by the posterior pituitary gland. Oxytocin is commonly referred to as the 'love hormone' as it is also involved in social bonding, sexual reproduction, and breastfeeding.

Stimulation of Uterine Contraction:
During childbirth, the release of oxytocin stimulates uterine contractions in several ways:

1. Positive Feedback Mechanism:
- Oxytocin stimulates the uterine muscles to contract.
- As the uterine muscles contract, it stretches the cervix, causing the release of more oxytocin.
- This creates a positive feedback loop, where oxytocin stimulates contractions, and contractions stimulate the release of more oxytocin.
- This positive feedback mechanism intensifies the contractions and helps to progress labor.

2. Stimulation of Prostaglandin Release:
- Oxytocin stimulates the release of prostaglandins, which are hormone-like substances involved in uterine contraction.
- Prostaglandins help to soften and thin the cervix, making it easier for the baby to pass through the birth canal.

3. Inhibition of Progesterone:
- Oxytocin inhibits the production of progesterone, another hormone that maintains pregnancy.
- As progesterone levels decrease, the uterine muscles become more sensitive to oxytocin, leading to stronger contractions.

4. Stimulation of Milk Ejection Reflex:
- Oxytocin also plays a role in breastfeeding.
- After childbirth, oxytocin stimulates the milk ejection reflex, causing the release of milk from the mammary glands.
- This helps to nourish the newborn and establish the bond between the mother and baby.

Conclusion:
In summary, the stimulation of uterine contractions during childbirth is primarily brought about by oxytocin. This hormone is released in response to various physiological changes and plays a crucial role in initiating and intensifying labor. Oxytocin's actions include stimulating uterine contractions, promoting the release of prostaglandins, inhibiting progesterone, and facilitating breastfeeding.

Similar NEET Doubts

Q. Which hormone is responsible for inducing strong uterine contractions during parturition (childbirth)?

Select the correct option- contraction of uterus and Ejection of milk control by a.Oxytocin, Oxytocin b.Oxytocin, Prolactin c.Prolactin, Prolactin d.LH, Oxytocin?

During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then is

The hormone causing release of milk after the birth of young one is

What is the difference b/w the function of prolactin oxytocin progesterone oeastrogen?

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

Physics Class 11

Top Courses for NEET

Top Courses for NEET

Suggested Free Tests

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company