Repro Overview and Male I

Question 1

What is the gonad?

Answer 1

Glands that produce gametes and hormones (exocrine and endocrine portions)

Question 2

What is the female gonad? What are it’s endocrine and exocrine functions?

Answer 2

Ovary- Female
Exocrine: Produces egg
Endocrine: Estrogen, progesterone, inhibin, relaxin

Question 3

What is the male gonad? What are it’s endocrine and exocrine functions?

Answer 3

Testes- Male
Exocrine: Produces sperm
Endocrine: Testosterone

Question 4

In general, what do the reproductive duct systems do?

Answer 4

Receives, stores,and transports gametes

Question 5

What is the female reproductive duct system?

Answer 5

Fallopian tube

Question 6

What is the male reproductive duct system?

Answer 6

Ductus epididymis, vas deferens, ejaculatory duct (urethra)

Question 7

What do accessory sex glands do?

Answer 7

Produce substances that support gametes

Question 8

What are the female accessory sex glands?

Answer 8

Greater and lesser vestibular glands, paraurethral glands

Question 9

What are the male accessory sex glands?

Answer 9

Seminal vesicles, prostate gland, bulbourethral glands

Question 10

Male and female sex glands are _________, they derive from the same embryonic structure.

Answer 10

homologous

Question 11

What are the male external genitalia?

Answer 11

The penis and scrotum

Question 12

What is the perineum? What are its margins?

Answer 12

a diamond shaped area between the thighs

Bounded by pubic symphysis to coccyx, between ischial tuberosities

Question 13

The scrotum is a sac of skin and superficial ____ that hangs outside the __________ cavity

Answer 13

fascia

abdominopelvic

Question 14

What divides the scrotum?

What is the scout’s temperature and why?

Answer 14

median septum

Is 2-3 degrees lower than body temp, best for producing sperm

Question 15

What 3 mechanisms regulate the temperature of the scrotum?

Answer 15

Dartos muscle
Cremaster muscle
Pampiniform plexus

Question 16

What kind of muscle is the dartos?

Answer 16

Subcutanous layer of smooth muscle

Question 17

What does the dartos muscle do? Why?

Answer 17

Contracts when it’s cold

Creates wrinkling of the skin of the scrotum when it contracts: ↓surface area→ ↓ heat loss

Question 18

What is the cremaster muscle an extension of? What kind of muscle is it?

Answer 18

Small bands of internal abdominal oblique muscle surround testes; skeletal muscle

Question 19

What does the cremaster muscle do?

Answer 19

When it’s cold out, the cremaster contracts and draws scrotum closer to the body
Opposite happens when it’s warm

Question 20

Which muscle “suspends” the scrotum?

Answer 20

Cremaster

Question 21

What does the pampiniform plexus do?

Answer 21

The countercurrent heat exchanger

An extensive network of veins that surround the testicular artery

Question 22

What does GnRH do?

Answer 22

From hypothalamus- stimulates release of FSH and LH from ant. pituatary

Question 23

What does FSH do?

Answer 23

Initiates spermatogenesis by stimulating the Sertoli cells to secrete ABP which binds testosterone and accumulates it in the lumen of the seminiferous tubules- near sperm

Question 24

What does LH do?

Answer 24

Stimulates Leydig cells to produce and secrete testosterone

Question 25

What does inhibin do?

Answer 25

Regulates the production of sperm (high vs low count) from Sertoli cells in seminiferous tubules

Question 26

What there things do testosterone and other androgens do?

Answer 26

1- Stimulate male pattern of development
2- Develops secondary sex characteristics
3- Sexual functions a- spermatogenesis`, b- male sexual behavior