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

(a) (i) The oral pills contain hormones which stop the ovaries from releasing ovum into the  oviduct. 

(ii) The vaginal pills contain the chemicals called spermicides which kill the sperm.  

(b) Copper- T is effective in preventing pregnancy. It is placed inside the uterus and it prevents  the flow of sperms in the uterus.  

(c) AIDS.