Human Reproduction Flashcards
What is the purpose of Cremaster muscle?
Elevates the testes to maintain the right temp. for spermatogenesis
Cryptorchidism
Failure of testes to descend into the scrotum from the abdomen
what are found between 2 seminiferous tubules?
Blood vessels/Leydig cells/Immunologically competent cells
Functions of Sertoli cells
- Nourish germ cells
- Produce inhibin & Anti-mullerian hormone
- Basis of blood testis barrier
- Phagocyte injured or dead sperm cells
What is the correct sequence of transport of sperms in the Male reproductive sys?
Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus
Spermiation
Liberation of sperms from sertoli cells of seminiferous tubules
Testis is attached to walls of scrotal sac with the help of group of fibres called………………
Gubernaculum or mesorchium
Epididymis function
Maturation, motility and storage of sperms
which tube re-enters abdomen and loops over the urinary bladder?
Vas Deferens
3 coats by which testis is covered
outer - tunica vaginalis
middle-tunica albuginea
inner-tunica vasculosa
3 parts of epididymis
upper-caput
middle-corpus
basal-cauda
erection of penis is controlled by ______nervous system
parasympathetic nervous system
ejaculation of semen is controlled by _____nervous system
sympathetic nervous system
spermiogenesis/spermateleosis
process of transformation of circular spermatid to spermatozoa
During cleavage in zygote mitotic spindle assembly is done by
proximal centriole of sperm
Follicular atresia
process by which ovarian follicles degenerate between the time of birth till puberty
most powerful sphincter in our body
External Os
Progesterone(Feedback)
progesterone gives negative Feedback to LH
moderate amt of Estrogen (Feedback)
Estrogen in moderate amts gives negative Feedback to GnRH,FSH,LH
High amts of estrogen (Feedback)
high amts of estrogen gives positive Feedback to GnRH,FSH,LH(LH -surge induced)
Inhibin(Feedback)
Inhibin gives negative Feedback for FSH
Which germ layers form Chorion
outside-ectoderm(trophoectoderm)
Inside-mesoderm
Which germ layers form Amnion
outside-Mesoderm
Inside-Ectoderm
Which germ layers form Allantois
outside-mesoderm
Inside-endoderm
Which germ layers form yolk sac
outside-mesoderm
Inside-endoderm
Amniotes examples
Reptiles,Aves,Mammals
RAM
Anamniotes
Cyclostomata,Pisces ,AAmphibia
CyPA
Allantois stores excretory wastes in
Reptiles , birds and prototherians(NOT humans)
Hormones of Human Placenta
hCG
relaxin
HPL/hCS
CRH/CRF
what is the function of corticotropin-releasing hormone/factor
- Establishes timing of birth
2. increases secretion of cortisol
On the basis of histology human placenta is
Haemochorial
Haemopoiesis initially occurs in which extra embryonic layer in humans?
Yolk Sac
After implantation endometrium is known as
Decidua
Implantation of blastocyst takes place abt ____ days after fertilization
7-8 days
What are the layers of ovary made of?
Outer-germinal epithelium
inner-T.albuginea made of WFCT
