Lect 8 - Development of Reproductive System II

Question 1

The urogenital sinus leads to which adult structure in women?

Answer 1

Hymen

Question 2

What is hematocolpos? What is a cause of same?

Answer 2

1) menstrual blood trapped in the vaginal vault

2) imperforate hymen

Question 3

The development of the sinovaginal bulbs are from?

Answer 3

Sinus tubercle

Question 4

What causes a double uterus?

Answer 4

incomplete fusion of the paramesonephric ducts

Question 5

What is another name for a double uterus?

Answer 5

uterine didelphys

Question 6

What causes a bicornuate uterus?

Answer 6

Failure of the superior portion of the paramesonephric ducts to fuse

Question 7

What is the difference between a bicornuate and a septate uterus?

Answer 7

Septate uterus is divided by fibrous tissue in the middle, not viable endometrium

Question 8

What causes a unicornuate uterus?

Answer 8

incomplete development of one of the paramesonephric ducts

Question 9

What causes a rudimentary horn?

Answer 9

inhibition of one of the cornu of the uterus

Question 10

What causes vaginal agenesis?

Answer 10

failure of the sinovaginal bulbs to develop

Question 11

What usually accompanies vaginal agenesis?

Answer 11

absent uterus

Question 12

A failure of the canalization of the vaginal plate causes?

Answer 12

Vaginal atresia

Question 13

Failure of the inferior end of the vaginal plate to perforate causes?

Answer 13

imperforate hymen

Question 14

A hydrocele in a women can find itself in the patent remnant of the round ligament passing through the inguinal canal. What is this patency called?

Answer 14

Canal of Nuck

Question 15

The development of the external genital organs remain undifferentiated until week ______.

Answer 15

week 7

Question 16

The development of the external genital organs are fully differentiated on week ______.

Answer 16

week 12

Question 17

The UG membrane and the anal membrane are formed by the ______ growing into the cloaca.

Answer 17

urorectal septum

Question 18

The _____ will form the primordial phallus.

Answer 18

genital tubercle

Question 19

The ______ will form the urogenital membrane.

Answer 19

cloacal membrane

Question 20

________ converts testosterone into _______

Answer 20

5-alpha reductase, DHT

Question 21

What forms the spongy urethra?

Answer 21

Fusion of urethral folds on the ventral surface

Question 22

What forms the corpus spongiosum and the corpus cavernosum?

Answer 22

mesenchyme of phallus

Question 23

What causes hypospadias?

Answer 23

failure of urethral folds to fuse due to inadequate androgen production

Question 24

What is epispadias?

Answer 24

urethra opens on dorsal surface of penis

Question 25

The urethral folds fuse in the posterior aspect to form what in females?

Answer 25

Labia minora

Question 26

The genital tubercle (primordial phallus) elongates then decreases to form what?

Answer 26

Clitoris

Question 27

The labioscrotal swellings do not fuse in females resulting in what?

Answer 27

labia majora