If mammalian ovum fails to get fertilized, which one of the following is unlikely?
Corpus luteum will disintegrate.
Estrogen secretion further decreases.
Primary follicle starts developing.
Progesterone secretion rapidly declines.
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is:
Spermatocyte - spermatogonia - spermatid - sperms
Spermatogonia - spermatocyte - spermatid - sperms
Spermatid - spermatocyte - spermatogonia - sperms
Spermatogonia - spermatid - spermatocyte - sperms
Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus ?
Chorion
Allantois
Yolk sac
Amnion
What is true for cleavage?
Size of embryo increases
Size of cells decreases
Size of cells increases
Size of embryo decreases
Seminal plasma in human is rich in:
Fructose, calcium and certain enzymes.
Fructose and calcium but has no enzymes.
Glucose and certain enzymes but has no calcium.
Fructose and certain enzymes but poor in calcium.
Bartholin's glands are situated:
On either side of vagina in humans
On either side of vas deference in humans
On the sides of the head of some amphibians
At the reduced tail end of birds
Which part of ovary in mammals acts as an endocrine gland after ovulation?
Graafian follicle
Stroma
Germinal epithelium
Vitelline membrane
Stratum germinativum is an example of which kind of epithelium?
Cuboidal
Ciliated
Columnar
Squamous
Which one of the following is the most likely reason of regular menstruation cycle not occurring in females ?
Fertilization of the ovum
Maintenance of the hypertrophical endometrial lining
Maintenance of high concentration of sex-hormones in the blood stream
Retention of well-developed corpus luteum
Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled A,B,C,D .
A B C D
Ureter Postate Seminal vesicle Bulbourethral gland
Vas deferens Seminal vesicle Prostate Bulbourethral gland
Vas deferens Seminal vesicle Bulbourethral gland Prostate
Ureter Seminal vesicle Prostate Bulbourethral gland.
