Q. No.Identify the cells that are haploid: (1) spermatogonia (2) primary spermatocytes (3) secondary spermatocytes (4) spermatids (5) spermatozoa
1.
1, 2, and 3
2.
2, 3, 4, and 5
2.
3, 4, and 5
4.
4 and 5 only
After leaving the testes, spermatozoa pass sequentially through the :
| 1. | seminiferous tubule, rete testis, efferent ductule, and epididymis |
| 2. | epididymis, ductus deferens, seminal vesicle, and ejaculatory duct |
| 3. | membranous urethra, prostatic urethra, and spongy urethra |
| 4. | epididymis, ductus deferens, ejaculatory duct, and urethra |
The process of maturation of spermatids to sperms and the cells that facilitate this process are respectively:
1. spermiogenesis; sustentacular cells
2. spematocytogenesis; spermatogonia
3. spermiation; Sertoli cells
4. spermatogenesis; interstitial cells
Ectopic pregnancies are referred to as :
| 1. | pregnancies with a genetic abnormality |
| 2. | implantation of the embryo at a site other than the uterus |
| 3. | implantation of a defective embryo in the uterus |
| 4. | pregnancies terminated due to hormonal imbalance |
Which one of the following is not the function of the placenta?
| 1. | It facilitates the supply of oxygen and nutrients to the embryo |
| 2. | It secretes oestrogen |
| 3. | It facilitates the removal of carbon dioxide and waste material from the embryo |
| 4. | It secretes oxytocin during parturition |
In a normal pregnant woman, total gonadotropin activity was assessed. The expected result was :
| 1. | High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo |
| 2. | High level of circulating HCG to stimulate endometrial thickening |
| 3. | High levels of FSH and LH in the uterus to stimulate endometrial thickening |
| 4. | High level of circulating HCG to stimulate oestrogen and progesterone synthesis |
Which one of the following statements about morula in humans is correct?
| 1. | It has an almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA |
| 2. | It has far less cytoplasm as well as less DNA than in an uncleaved zygote |
| 3. | It has a more or less equal quantity of cytoplasm and DNA as in an uncleaved zygote |
| 4. | It has more cytoplasm and more DNA than an uncleaved zygote |
Which one of the following is the most likely reason for the regular menstruation cycle not occurring in females?
| 1. | Fertilisation of the ovum |
| 2. | Maintenance of the hypertrophical endometrial lining |
| 3. | Maintenance of a high concentration of sex hormones in the bloodstream |
| 4. | Retention of well-developed corpus luteum |
| Column I | Column II | |
| 1. | Ovulation | LH and FSH attain peak levels and sharp fall in the secretion of progesterone |
| 2. | Proliferative phase | Rapid regeneration of myometrium and maturation of Graafian follicle |
| 3. | Development of corpus luteum | Secretory phase and increased secretion of progesterone |
| 4. | Menstruation | Breakdown of myometrium and ovum not fertilized |
Which one of the following statement is incorrect about menstruation?
| 1. | During normal menstruation, about 40 mL of blood is lost |
| 2. | The menstrual fluid can easily clot |
| 3. | At menopause in the female, there is, an especially, abrupt increase in gonadotropic hormones |
| 4. | The beginning of the cycle of menstruation is called menarche |
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