Exam II: Male Repro. Physiology

Question 1

Blood supply to the scrotum

Answer 1

External pudendal

Question 2

Nerve supply to the scrotum

Answer 2

Genitofemoral n.

Question 3

Lymph drainage of scrotum

Answer 3

Superficial inguinal lymph node

Question 4

Lymphatic drainage of the testes

Answer 4

Lumbar lymph nodes

Question 5

Testes approximately ___ degrees C lower than core body temp.

Answer 5

4

Question 6

countercurrent arterio-venous exchange of testes

Answer 6

Pampiniform plexus

Question 7

What are the 3 functions of the pampiniform plexus?

Answer 7

1. Thermoregulation
2. Concentration of testosterone
3. Reduced pulsatility

Question 8

What are the 2 cell types of the seminiferous tubules

Answer 8

1. sertoli

2. spermatogenic cells

Question 9

What are the 3 functions of the blood testis barrier?

Answer 9

1. Maintains environment
2. Protects germ cells
3. Prevents autoimmune response to sperm

Question 10

What is the function of the epididymis

Answer 10

sperm maturation and storage

Question 11

T/F the epididymis is androgen independent?

Answer 11

F. Androgen dependent

Question 12

What are the 2 types of penile structure?

Answer 12

1. musculocavernosus

2. fibrous

Question 13

forms the body of the penis

Answer 13

corpus cavernosum

Question 14

surrounds the urethra

Answer 14

corpus spongiosum

Question 15

H that inhibits development of paramesonephric ducts in male embryo

Answer 15

AMH

Question 16

Peptide hormone that is secreted by hypothalamus, that acts on anterior hypophysis to inc. secretion of LH and FSH

Answer 16

GnRH

Question 17

H that binds and acts on leydic cells to stimulate androgen production from leydig cells

Answer 17

LH

Question 18

H secreted by pituitary gland and enhances LH-induced T secretion

Answer 18

PRL (Prolactin)

Question 19

H that acts on Sertoli cellsto promote p synthesis

Answer 19

FSH

Question 20

What 4 hormones are produced by sertoli cells in response to FSH

Answer 20

1. ABP
2. Inhibin
3. Estrogens
4. T to dihydroT

Question 21

H released from sertoli cells into the seminiferous tubules, that ensures high intratubular conc. of T

Answer 21

ABP

Question 22

H secreted from sertoli cells that has a negative feedback effect on pituitary release of FSH

Answer 22

inhibin

Question 23

Steroid hormone produced by interstitial cells under LH influence

Answer 23

T

Question 24

T has a negative feedback on hypothalamus to dec. _____

Answer 24

GnRH

Question 25

Hormone synthesized in sertoli cells that is a mediator of sexual development and secondary sex characteristics

Answer 25

Dihydrotestosterone

Question 26

Steroid hormone produced in sertoli cells that supports spermatogenisis and has a negative feedback on hypothalamus to dec. GnRH

Answer 26

Estrogen

Question 27

Peptide hormone produced in sertoli cells that has a negative feedback on pituitary to dec. FSH

Answer 27

Inhibin

Question 28

H produced in sertoli cells that function to bind T to maintain intratubular conc.

Answer 28

ABP

Question 29

What is the flow of spermatogenisis

Answer 29

1. spermatagonia
2. spermatocytes
3. secondary spermatocytes
4. spermatids
5. spermatozoa

Question 30

Formation of spermatid from spermatogonia

Answer 30

spermatocytgenesis

Question 31

morphological change of spermatid into spermatozoa

Answer 31

spermiogenesis

Question 32

what do sperm acquire in the epididymis

Answer 32

capability for motility and fertilization

Question 33

The ejection of sperm from epididymis

Answer 33

Emission

Question 34

The Ejection of semen from urethra

Answer 34

Ejaculation