Select the correct option describing gonadotropin activity in a normal pregnant female
1. High level of FSH and LH stimulates the thickening of endometrium
2. High level of FSH and LH facilitate implantation of the embryo
3. High level of HCG stimulates the synthesis of estrogen and progesterone
4. High level of HCG stimulates the thickening of endometrium
Perisperm differs from endosperm in
1. being a haploid tissue
2. having no reserve food
3. being a diploid tissue
4. its formation by fusion of secondary nucleus with several sperms
Which one of the following statements is false in respect of viability of mammalian
sperm?
1. Sperm is viable for only up to 24 h
2. Survival of sperm depends on the pH of the medium and is more active in alkaline
medium
3. Viability of sperm is determined by its motility
4. Sperms must be concentrated in a thick suspension
The Leydig cells as found in the human body are the secretory source of
1. progesterone
2. intestinal mucus
3. glucagon
4. androgens
Which one of the following helps in absorption of phosphorus from soil by plants?
1. Rhizobium
2. Anabaena
3. Frankia
4. Glomus
The figure given below depicts a diagrammatic sectional view of the female
reproductive system of humans. Which one set of three parts out of A-F have been
correctly identified?
1. C-lnfundibulum, D-Fimbriae, E-Cervix
2. D-Oviducal funnel, E-Uterus, F-Cervix
3. A-Perimetrium, B-Myometxium, C-Fallopian tube
4. B-Endometrium, C-Infundibulum, D-Fimbriae
Sertoli cells are found in
1. ovaries and secrete progesterone
2. adrenal cortex and secrete adrenalin
3. seminiferous tubules and provide nutrition to germ cells
4. pancreas and secrete cholecystokinin
Vasa efferentia are the ductules leading from
1. testicular lobules to rete testis
2. rete testis to vas deferens
3. vas deferens to epididymis
4. epididymis to urethra
The second maturation division of the mammalian ovum occurs
1. shortly after ovulation before the ovum makes entry imto the Fallopian rube
2. until after the ovum has been penetrated by a sperm
3. until the nucleus of the sperm has fused with that of the ovum
4. in the Graafian follicle following the first maturation division
Which one of the following statements about human sperm is correct?
1. Acrosome has a conical pointed structure used for piercing and penetrating the
egg, resulting in fertilization
2. The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization
3. Acrosome serves as a sensory structure leading the sperm towards the ovum
4. Acrosome serves no particular function