Zoology MCQs for NEET — Practice Questions with Answers

Surgical methods, also called sterilisation, are generally advised for the male/female partner as a terminal method to prevent any more pregnancies. Surgical intervention blocks gamete transport and thereby prevent conception. Sterilisation procedure in the male is called ‘vasectomy’ and that in the female, ‘tubectomy’.  These techniques are highly effective but their reversibility is very poor. (page-61)

MTPs are considered relatively safe during the first trimester, i.e., upto 12 weeks of pregnancy.  Second trimester abortions are much more riskier. (page-62)

(3) Early symptoms of most of the STDs are minor and include itching, fluid discharge, slight pain, swellings, etc., in the genital region. It also leads to complications which include pelvic inflammatory diseases (PID), abortions, still births, ectopic pregnancies, infertility or even cancer of the reproductive tract. (page- 63)

Though all persons are vulnerable to STDs but their incidences are reported to be very high among persons in the age group of 15-24 years. (page-63)

(2) Surgical intervention blocks gamete transport and thereby prevent conception. (page-61 )

(3) Condoms should always be used during coitus to avoid STDs and AIDS. (page- 63)

(3) IUDs increase phagocytosis of sperms within the uterus and the Cu ions releases 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. (page-60)

(3)

I. MTPs are considered relatively safe during the first trimester, i.e., upto 12 weeks of pregnancy. Second trimester abortions are much more riskier.

II. MTPs are not used as a contraceptive method to get rid of unwanted pregnancies either due to casual unprotected intercourse or failure of the contraceptive used during coitus or rapes. MTPs are also essential in certain cases where continuation of the pregnancy could be harmful or even fatal either to the mother or to the foetus or both.

III. MTPs are not always surgical, sometimes oral contraceptives are helpful.

IV. MTPs conducted under unqualified doctors are illegal.

(page-62)

(1) Oral administration of small doses of either progestogens or progestogen–estrogen combinations is used in the form of tablets and hence are popularly called the pills. (Page-61)

(4)

(a) is correct because pills inhibit ovulation and implantation as well as alter the quality of cervical mucus to prevent or retard entry of sperms.

(b) is correct because in vasectomy, a small part of the vas deferens is removed or tied up through a small incision on the scrotum. This blocks sperm transport and thus conception.

(c) is correct as IUDs increase phagocytosis of sperms within the uterus and the Cu ions released suppress sperm motility and the fertilising capacity of sperms, make the uterus unsuitable for implantation and the cervix hostile to the sperms.

(page- 60)