Extrusion of second polar body from egg nucleus occurs :
after fertilization
before entry of sperm into ovum
simultaneously with first cleavage
after entry of sperm but before fertilization
D.
after entry of sperm but before fertilization
Extrusion of second polar body from egg nucleus occurs after entry of sperm but before fertilization. The entry of sperm into the ovum induces completion of the meiotic division of the secondary oocyte. Entry of sperm causes breakdown of metaphase promoting factor (MPF) and turns on anaphase promoting complex (APC).
The inner glandular layer of the uterus is
endometrium
myometrium
fallopian tubes
perimetrium
perimetrium
The release of sperms from the seminiferous tubules is called
Spermiogenesis
Spermiation
Spermatogenesis
Fertilisation
Fertilisation
Each secondary spermatocyte after second meiotic division produces
four haploid spermatids
only one haploid spermatid
two haploid spermatids
two diploid spermatids
two diploid spermatids
The nuclear structure observed by Henkings in 50% of the insect sperm after spermatogenesis was
X body
Autosome
Y chromosome
Nucleolus
Nucleolus
Identify the wrongly labelled part
Primary follicle
Ovum
Graafian follicle
Corpus luteum
Corpus luteum
Lactational amenorrhea means
Medical termination of pregnancy
Oral administration of progestrogen
Coitus interrupts
Intrauterine insemination
Intrauterine insemination
Foetal ejection reflex in human female induces
The release of hormones from the placenta
The growth and development of ovarian follicles
The release of oxytocin from the maternal pituitary
The release of gonadotropins
The release of gonadotropins
Colostrum the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains
Monocytes
Macrophages
Immunoglobulin A
Natural killer cells
Select the correct sequence for transport of sperm cells in male reproductive system.
Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → urethra → urethral meatus
Seminiferous tubules → Vasa efferentia → epididymis → Inguinal canal → Urethra
Testis → Epididymis → vasa efferentia → vas deferens → ejaculatory duct → inguinal canal → urethra → Urethral meatus
Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra
