Lecture 12

Question 1

What hormones are in birthcontrol

Answer 1

Hormones: Estrogen &
progestin/ or synthetic
progesterone, without
estrogen

Question 2

What do the hormones in birth control do

Answer 2

They shut down the
pituitary’s production of
both FSH and LH → no
follicle develop in the ovary.

Question 3

How the intrauterine device
(IUD) work to prevent
pregnancy?

Answer 3

Alter the environment of
the uterus and uterine tubes

Question 4

When is genetic sex determined

Answer 4

the moment of fertilization

Question 5

Is a Zygote with XX Male or female

Answer 5

female

Question 6

Is a zygote with XY male or female

Answer 6

Male

Question 7

Where does gonadal tissue start developing from

Answer 7

the mesoderm

Question 8

What creates development of the testes?

Answer 8

Indifferent tissue, with Y chromosome →
secretion of testosterone → development of
testis

Question 9

If the Y chromosome is absent what is developed?

Answer 9

the ovary

Question 10

What is the failure of the testes to descend

Answer 10

Cryptorchidism

Question 11

Do the Wolffian (mesonephric) ducts become male or female ducts?

Answer 11

male

Question 12

Do the Müllerian (paramesonephric)
ducts become male or female genital
ducts

Answer 12

female

Question 13

What do the Mullerian ducts develop into?

Answer 13

Uterine tubes: from the
cephalic vertical part
Uterus: from the middle
part
Vagina: from the caudal
vertical part

Question 14

Which of the following
structures is a derivative
of the mesonephric
(wolffian) duct?

Answer 14

Vas Deference

Question 15

What is the Indifferent stage

Answer 15

the first 6 weeks where it is impossible to identify gender

Question 16

What three structures develop at 6 weeks

Answer 16

Genital tubercle: Cranial to the
cloacal membrane
– Forms the penis in male
– Glans clitoris in female
* Urethral folds: on each side of the
urogenital groove (the cloacal
membrane)
– In males, the groove disappears & the
folds unite to form the urethra
– In females, the groove persists and
becomes the vestibule and the
vaginal opening. The folds → give
the labia minora.
* Genital swellings on each side of
the urethral folds.
– In males: the scrotal swellings
– In females, the labia majora

Question 17

From which
embryological structure
the labia majora
develops?

Answer 17

Genital swelling

Question 18

what is endometriosis

Answer 18

growth of endometrial tissue outside
the uterus.