CBSE Class 12 Biology Reproductive Health Worksheet Set 05

Very Short Answer Questions

Question. Indiscriminate diagnostic practices, using X-rays, etc., should be avoided. Give one reason.
Answer. These practices act as carcinogens which convert normal cells to neoplastic cells by harmful mutations or chromosomal aberration.

Question. Describe the lactational amenorrhea method of birth control. 
Answer. Lactational amenorrhea is based on the principle that during the period of intense lactation after parturition, menstrual cycle or ovulation does not occur.

Question. Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.
Answer. Yes, the ban is necessary because amniocentesis is misused for determining the sex of the foetus and then aborting the child if it is a female.

Short Answer Questions

Question. Do you think that reproductive health in our country has improved in the past 50 years? If yes, mention some such areas of improvement.
Answer. Yes, reproductive health in our country has improved in the last 50 years.
Some areas of improvement are:
(i) Better awareness about sex-related matters.
(ii) Increased number of medically assisted deliveries and better post-natal care of child and mother leading to decreased maternal and infant mortality rates. 
(iii) Increased number of couples with small families.
(iv) Better detection and cure of STDs and overall increased medical facilities for all sex-related problems.

Question. What are the measures one has to take to prevent from contracting STDs?
Answer. STDs can be prevented by the following methods:
(i) Avoid sex with unknown partners/multiple partners.
(ii) Always use condoms during coitus.
(iii) Always contact a qualified doctor for any doubt in early stage of infection and get complete treatment if diagnosed with disease.

Question. Is the use of contraceptives justified? Give reasons.
Answer. Yes, use of contraceptive is justified because it helps to control the rapid growth of human population. It will also help in preventing unwanted pregnancies and STDs. Contraceptives also help in controlling the population growth rate.

Question. What is amniocentesis? Why has the government imposed a statutory ban in spite of its importance in the medical field?
Answer. Amniocentesis is a foetal sex determination test based on the chromosomal pattern in cells extracted from the amniotic fluid, surrounding the developing embryo. Amniocentesis is used for sex determination, which most people go for, to kill female foetus. Therefore, it has been banned.

Question. Removal of gonads cannot be considered as a contraceptive option. Why?
Answer. Removal of gonads not only stops the production of gametes but will also stop the secretions of various important hormones which are important for bodily functions. This method is irreversible and thus, cannot be considered as a contraceptive method.

Question. Suggest some methods to assist infertile couples to have children.
Answer. The reasons of infertility could be physical, congenital diseases, drugs, immunological and even psychological. Specialised health-care units called infertility clinics could help in diagnosis and corrective treatment of some of these disorders. Through special techniques called assisted reproductive technologies (ART), infertile couple could be assisted to have children. ART includes: (i) In vitro fertilisation, (ii) Gamete intra fallopian transfer (GIFT), (iii) Intra cytoplasmic sperm injection (ICSI), and (iv) Artificial insemination (AI).

Question. Correct the following statements:
(a) Surgical methods of contraception prevent gamete formation.
(b) All sexually transmitted diseases are completely curable.
(c) Oral pills are very popular contraceptives among the rural women.
(d) In E.T. techniques, embryos are always transferred into the uterus.
Answer. (a) Surgical methods of contraception prevent gamete transport.
(b) All sexually transmitted diseases are not completely curable.
(c) Oral pills are very popular contraceptives among the urban women.
(d) In E.T. techniques, embryos with up to 8 blastomeres are transferred into the fallopian tube and embryos with more than 8 blastomeres are transferred into the uterus.

Please click on below link to download CBSE Class 12 Biology Reproductive Health Worksheet Set E