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प्रश्न
Males in whom testes fail to descend to the scrotum are generally infertile. Why?
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उत्तर
If the testes fail to descend to the scrotum, gametogenesis could be inhibited, the process of spermatogenesis require a marginally lesser ambient temperature than that in the abdominal cavity.
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संबंधित प्रश्न
A large number of married couples the world over are childless. It is shocking to know that in India the female partner is often blamed for the couple being childless.
- Why in your opinion the female partner is often blamed for such situations in India? Mention any two values that you as a biology student can promote to check this social evil.
- State any two reasons responsible for the cause of infertility.
- Suggest a technique that can help the couple to have a child where the problem is with male partner.
Correct the following statement:
In E. T. techniques, embryos are always transferred into the uterus.
Write a brief note on the causes of infertility.
Expand the following:
ZIFT
Explain one application of the following:
ZIFT
Fill in the blank:
The disc-like structure which helps in the transfer of substances to and from the fetus’s body is called _______.
Fill in the blank:
Gonorrhoea is caused by _______ bacteria.
Fill in the blank:
The hormone produced by the testis is _______.
Expand the following.
ZIFT
In ______ the egg is first fertilized outside the body and then it is inserted into the oviduct.
In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation?
Test-tube baby is one who ______.
Which of the following is ART?
Which of these can be used to cure infertility in couples where male partner has very low sperm count?
Identify the correct reasons for infertility.
(i) Drugs
(ii) Diseases
(iii) Congenital
(iv) Use of Contraceptives
(v) Immunological or psychological
(vi) Assisted reproductive technology
In ZIFT method, there is ______.
In which of the following techniques, the embryos are transferred to exist those females who cannot conceive?
Given below are Column A with a list of certain Assisted Reproductive Technologies (ART) and in Column B the procedures followed during ART:
| Column A | Column B | ||
| S. No. | Names of ART | S. No. | Procedures |
| (A) | GIFT | (i) | Transfer of ovum from a donor into the fallopian tube of another female. |
| (B) | ICSI | (ii) | Transfer of semen from the donor into the vagina of the female. |
| (C) | ZIFT | (iii) | Injecting sperm directly into the ovum. |
| (D) | IUI | (iv) | Transfer of early embryos into the fallopian tube. |
Choose the option where ART correctly matches with the procedure.
Give a term for the following:
An ART in which eggs are removed from the ovary of the female, fertilised and then placed in her fallopian tube.
