1
What is the work of copper T:
- To inhibit implantation of blastocyst
- To inhibit gametogenesis
- To inhibit fertilization
- To inhibit ovulation
Answer
(1) To inhibit implantation of blastocyst, (3) To inhibit fertilization
Solution
As per NCERT, copper-releasing IUDs (CuT, Cu7, Multiload 375) increase phagocytosis of sperms within the uterus, and the Cu ions released suppress sperm motility and the fertilising capacity of sperms ⇒ fertilisation is inhibited.
As per NCERT, IUDs also make the uterus unsuitable for implantation ⇒ implantation of the blastocyst is inhibited.
Copper T acts inside the uterus, not on the ovaries, so it neither inhibits gametogenesis nor ovulation.
Answer: (1), (3)
AIPMT 2000