Match the LIST-I with LIST-II
| LIST-I | LIST-II |
|---|---|
| Contraceptive methods | Functions |
| A. Condoms | I. Phagocytosis of sperms within the uterus |
| B. Vaults | II. Make the uterus unsuitable for implantation and cervix hostile to the sperms |
| C. Multiload 375 | III. Ejaculated semen would not enter into the female reproductive tract |
| D. LNG-20 | IV. Prevent conception by blocking the entry of sperms through the cervix |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A - III, B - IV, C - I, D - II
(A) Condoms — this matches (III) Ejaculated semen would not enter into the female reproductive tract. A condom is a thin rubber or latex sheath that covers the penis (or the vagina and cervix in the female). It is a barrier method: the semen is collected in it, so it cannot reach the female tract.
(B) Vaults — this matches (IV) Prevent conception by blocking the entry of sperms through the cervix. Vaults, like diaphragms and cervical caps, are rubber barriers placed in the female reproductive tract to cover the cervix during coitus.
(C) Multiload 375 — this matches (I) Phagocytosis of sperms within the uterus. It is a copper releasing IUD. All IUDs increase the phagocytosis (engulfing) of sperms inside the uterus, and its copper ions also lower sperm movement.
(D) LNG-20 — this matches (II) Make the uterus unsuitable for implantation and cervix hostile to the sperms. It is a hormone releasing IUD. The hormone acts on the uterus and cervix in this way.
NCERT Extract:
Contraceptive Methods – “… Condoms … are barriers made of thin rubber/ latex sheath that are used to cover the penis in the male or vagina and cervix in the female, just before coitus so that the ejaculated semen would not enter into the female reproductive tract.”
Contraceptive Methods – “… Diaphragms, cervical caps and vaults are also barriers made of rubber that are inserted into the female reproductive tract to cover the cervix during coitus. They prevent conception by blocking the entry of sperms through the cervix.”
Contraceptive Methods – “… These Intra Uterine Devices are presently available as the non-medicated IUDs (e.g., Lippes loop), copper releasing IUDs (CuT, Cu7, Multiload 375) and the hormone releasing IUDs (Progestasert, LNG-20) …. IUDs increase phagocytosis of sperms within the uterus and the Cu ions released suppress sperm motility and the fertilising capacity of sperms. The hormone releasing IUDs, in addition, make the uterus unsuitable for implantation and the cervix hostile to the sperms.”