CBSE Class 12 Biology Reproductive Health Worksheet Set B

Very Short Answer Questions

Question. Give one reason to justify statutory ban on aminocentesis. 
Answer. Statutory ban on aminocentesis prevents female foeticide.

Question. Reproductive health refers only to healthy reproductive functions. Comment.
Answer. Reproductive health refers to the total well-being in all aspects of reproduction, i.e., physical,behavioural, psychological and social.

Question. In case of an infertile couple, the male partner can inseminate normally but the mobility of sperms is below 40 percent. Which kind of ART is suitable in this situation to form an embryo in the laboratory conditions, without involving a donor?
Answer. Intra Cytoplasmic Sperm Injection

Short Answer Questions

Question. Explain how do the following act as contraceptives:
(a) CuT (b) ‘Saheli’ 
Answer. (a) Cu2+ ions released suppress sperm motility, lowers the fertilising capacity of sperms.
(b) Inhibit ovulation, implantation, as well as alter the quality of cervical mucus to prevent or retard the entry of sperms.

Question. How do copper and hormone releasing IUDs act as contraceptives? Explain. 
Answer. The copper releasing IUDs release Cu ions, which suppress sperm motility and the fertilising capacity of sperms.
The hormone releasing IUDs make the uterus unsuitable for implantation and the cervix hostile to the sperms.

Question. Following table gives certain terms associated with ART. Fill in the spaces a, b, c and d.  (Image 131)
Answer. (a) Test tube baby programme
(b) ZIFT (Zygote intra fallopian transfer)
(c) GIFT (Gamete intra fallopian transfer)
(d) IUI (Intra uterine insemination)
IUI (Intra Uterine Insemination): In this method, the semen collected either from the husband or a healthy donor is artificially introduced into the vagina or into the uterus.
This technique is used in cases where the male is unable to inseminate sperms in the female reproductive tract or due to very low sperm counts in the ejaculation.

Question. What are the suggested reasons for population explosion?
Answer. The suggested reasons of population explosion are
(i) rapid decline in death rate.
(ii) decline in maternal mortality rate (MMR)
(iii) decline in infant mortality rate (IMR) and
(iv) increase in number of people in reproducible age.

Question. Why is medical termination of pregnancy (MTP) carried out?
Answer. MTP is carried out to get rid of unwanted pregnancies. It is also essential when the foetus is suffering from an incurable disease or when continuation of the pregnancy could be harmful or even fatal to the mother and/or foetus or terminate pregnancy in rape cases.

Question. All reproductive tract infections (RTIs) are STDs but all STDs are not RTIs. Justify with example.
Answer. Among the common STDs, hepatitis-B and AIDS are not infections of the reproductive organs though their mode of transmission could be through sexual contact also. All other diseases like gonorrhea, syphilis, genital herpes, are transmitted through sexual contact and are also infections of the reproductive tract.

Question. A couple where both husband and wife are producing functional gametes, but the wife is still unable to conceive, is seeking medical aid. Describe any one method that you can suggest to this couple to become happy parents.
Answer. Methods: IVF/ZIFT/AI
IVF (In vitro fertilisation): Ova from wife and sperm from the husband is collected. It is induced to form zygote under simulated laboratory conditions.

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