Anatomy And Histology II

Question 1

The indifferent gonad stage lasts

Answer 1

7-10 days

Question 2

The germ cell number has increased to approximately 10,000 by

Answer 2

The indifferent gonad stage

Question 3

Gonadal differentiation is directed by

Answer 3

a genetic program involving hundreds of genes initiated in the indifferent gonad

Question 4

Oogonial proliferation and oocyte formation requires expression of the

Answer 4

WNT4 and RSPO1 genes

Question 5

WNT4 and RSPO1 genes activate the

Answer 5

beta-catenin signaling pathway leading to loss of cell-cell adhesion between the female germ cells thus allowing them to enter meiosis

Question 6

In the male the Sry gene inhibits

Answer 6

The Wnt4 gene expression in the indifferent gonad and promotes the male sexual development program

Question 7

In the female fetus the wolffian duct

Answer 7

regresses and the müllerian duct differentiates in a cranial to caudal (head to tail) direction into oviduct, uterus , cervix, and upper third of the vagina

Question 8

The developmental processes that occur to bring about this organogenesis are under what control?

Answer 8

The control of steroid hormones that regulate key developmental genes.

Question 9

The major organs of the female reproductive system include:

Answer 9

Genital Tract, Ovaries, pituitary