Human Reproduction Question 3
Question: 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 that causes disintegration of endometrium.
In the light of the above statements, choose the correct answer from the options given below:
(1) A is false but R is true.
(2) Both A and R are true and R is the correct explanation of A.
(3) Both A and R are true but R is NOT the correct explanation of A.
(4) A is true but R is false.
Show Answer
Answer: (2) Both A and R are true and R is the correct explanation of A.
Explaination-
The endometrium is indeed necessary for the implantation of the blastocyst, which is the early stage of embryo development.
In the absence of fertilization, the corpus luteum, which forms from the ovarian follicle after ovulation, degenerates. This leads to a decrease in the levels of progesterone, which is essential to maintain the endometrial lining. Without sufficient progesterone, the endometrial lining undergoes disintegration and is shed during menstruation
