Spermatogenesis Flashcards
The differentiation of the primitive gonad in the utero into the testes and ovary is determined?
Genetically while the development of male genitalia depends on the presence of a secreting testes
The gonads have two functions.
List them
The production of germ cells( gametogenesis)
The secretion of sex hormones
Androgens and oestrogen are secreted by both?
Ovaries and testes
Androgen is secreted in the ——– in both sexes but converted to oestrogen in ——–
Adrenal cortex
Fat and other tissues.
Progesterone functions
It prepares the uterus for pregnancy
If pregnancy occurs it prepares the breast for milk production
Inhibin inhibits secretion of which hormone?
Follicle stimulating hormone
The secretory and gametogenic functions of the gonads is dependent on
FSH and LH
The higher the sex hormones and inhibin , the lower the
fSH and LH
The fluid in the lumen of the seminiferous tubule is poor in ———- and rich in ———-
Poor in glucose and protein
Rich in androgen, oestrogen, inositol, aspartic acid, glutamic acid and k+
Does an embryo contain primitive gonads for both sexes until about?
7 weeks
The prime male-determining gene is located on ——- arm of Y and it is called?
Short arm
SRY sex-determining region of Y chromosome
The female pattern of development occurs only in the absence of ——-
Male gene
Spermatogenesis cannot take place in the core body temperature of —–
37.5 °C
The temperature of the scrotum is about —–?
32°C
The scrotum is kept cool by?
By the air circulating around the scrotum.
And the heat exchange through the counter-current movement between the spermatic arteries and veins
