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Given below are the steps involved in pa...

Given below are the steps involved in parturition. Arrange them in proper sequence and select the correct option.
I. The induction of mild uterine contractions is called foetal ejection reflex.
II. Stronger uterine contractions causing the further release of oxytocin. III. Origination of signals from the fully developed foetus and placenta.
IV. Release of oxytocin from maternal pituitary
V. Expulsion of baby from the birth canal
(a) III , IV , I , II , V
(b) III, I , IV , II , V
(c) I, III , II , IV ,V
(d) II , IV , III, I,V

A

III , IV , I , II , V

B

III, I , IV , II , V

C

I, III , II , IV ,V

D

II , IV , III, I,V

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the sequence of steps involved in parturition, we need to analyze the given statements and arrange them in the correct order. Here’s the step-by-step breakdown: ### Step-by-Step Solution: 1. **Identify the starting point of parturition**: - The process of parturition begins with signals originating from the fully developed fetus and the placenta. This is described in statement **III**. 2. **Next step in the sequence**: - The signals from the fetus and placenta lead to the induction of mild uterine contractions, which is referred to as the fetal ejection reflex. This corresponds to statement **I**. 3. **Hormonal response**: - The mild uterine contractions stimulate the release of oxytocin from the maternal pituitary gland. This is captured in statement **IV**. 4. **Increased uterine contractions**: - The release of oxytocin causes stronger uterine contractions, which is detailed in statement **II**. 5. **Final step of parturition**: - The culmination of these processes results in the expulsion of the baby from the birth canal, as described in statement **V**. ### Arranged Sequence: Thus, the correct order of the steps is: - **III**: Origination of signals from the fully developed fetus and placenta. - **I**: The induction of mild uterine contractions (fetal ejection reflex). - **IV**: Release of oxytocin from maternal pituitary. - **II**: Stronger uterine contractions causing the further release of oxytocin. - **V**: Expulsion of baby from the birth canal. ### Final Answer: The correct option is **(a) III, I, IV, II, V**.
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