Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Endometrium is necessary for implantation of blastocyst. Reason R: In the absence of fertilization, the corpus luteum degenerates causing disintegration of endometrium. Choose the correct answer from the options given below:
medium
Human Reproduction
2023
biology
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Explanation
To solve this problem, we need to analyze the given statements:Assertion (A): Endometrium is necessary for implantation of blastocyst.Reason (R): In the absence of fertilization, the corpus luteum degenerates causing disintegration of endometrium.Let's break down each statement:āAssertion (A): - The endometrium is the inner lining of the uterus that thickens during the menstrual cycle in preparation for potential implantation of a blastocyst.
Our AI powered practice platform can help you achieve your doctor dream.
- It provides the necessary environment and nutrients for the blastocyst to implant and develop.
- Therefore, the assertion is true.
ā
Reason (R):
- The corpus luteum is responsible for secreting progesterone, which maintains the endometrium.
- In the absence of fertilization, the corpus luteum degenerates, leading to a drop in progesterone levels.
- This causes the endometrium to disintegrate and be shed during menstruation.
- Therefore, the reason is also true.
Now, let's determine if (R) is the correct explanation of (A):
ā
While (R) explains the process of endometrial disintegration in the absence of fertilization, it does not directly explain why the endometrium is necessary for implantation.
ā
The necessity of the endometrium for implantation is due to its role in providing a suitable environment for the blastocyst, not because of the degeneration process described in (R).
Therefore, (R) is not the correct explanation of (A).
Thus, the most appropriate answer is Option 2: Both (A) and (R) are true but (R) is NOT the correct explanation of (A).