External Genitalia Differentiation

Question 1

what does the genital fold become in females

Answer 1

labia

Question 2

what does genital swelling become in females

Answer 2

skin tissue around vulva

Question 3

what does the genital tubercle become in females

Answer 3

clitoris

Question 4

what does the genital fold become in males

Answer 4

form shaft

Question 5

what does genital swelling become in males

Answer 5

scrotum

Question 6

genital tubercle become in males

Answer 6

glans penis

Question 7

what reduces testosterone

Answer 7

5a-reducatse

Question 8

what is used to make external male genitalia and why

Answer 8

• dihydrotestosterone (DHT)
• 3x more potent than testosterone

Question 9

glans penis

Answer 9

• specialized distal end
• homologous to female receptable

Question 10

what male structure is heavily innervated with sensory neurons

Answer 10

glans penis

Question 11

where do testes begin in all species

Answer 11

internally

Question 12

what are the three phases to develop testes and Scotrun

Answer 12

1. nephric displacement
2. transabdominal phase
3. inguinal-scrotal phase

Question 13

what occurs in phase 1

Answer 13

location flip of gonads and kidneys

Question 14

what happens during phase 2

Answer 14

• distal end of gubernaculum pulls testis toward inguinal ring

Question 15

what causes phase 2 to occur

Answer 15

insulin like 3 produced by leydig cells

Question 16

gubernaculum job

Answer 16

suspends testes right in middle of body

Question 17

what are the two types of gubernaculum

Answer 17

cranial
caudal

Question 18

what is the gubernaculum attached to

Answer 18

peritoneum at inguinal ring

Question 19

where does the gubernaculum grow towards

Answer 19

inguinal ring

Question 20

what is the phase where the scrotum is made

Answer 20

phase 3

Question 21

in phase 3, what causes the gubernaculum to swell

Answer 21

testosterone from Leydig cells

Question 22

what does peritoneum form in area of gubernaculum

Answer 22

evagination

Question 23

what does the evaginal enlarging process form

Answer 23

inguinal canal where testes are drawn through into the scrotum by the gubernaculum regressing

Question 24

what follows the evaginal enlarging process

Answer 24

testicular blood supply and ductus deferens

Question 25

after passage, what happens to the inguinal canal and inguinal ring

Answer 25

constricts and closes to prevent movement of intestines into scrotum and return of testes into abdomen

Question 26

cryptorchidism

Answer 26

failure of testicular descent - unilateral or bilateral

Question 27

what is a scrotal hernia

Answer 27

passage of intestines into scrotum

Question 28

what causes a scrotal hernia

Answer 28

if ring doesn't close up all the way