Question

(a) What substances are contained (i) in oral pills, and (ii) in vaginal pills, used as contraceptives ? How do they work ?
(b) How does copper-T prevent pregnancy ?
(c) Name the disease caused by HIV.

Answer 1

Answer :

(a) (i) Oral pills have hormones that stop the ovaries from releasing ovum.
(ii) Vaginal pills have spermicides which kill the sperms.

(b) Copper-T prevents the implantation of fertilised egg in the uterus and, thus, prevents pregnancy.

(c) AIDS is caused by HIV.