Reproductive Male

Question 1

Primary male organs

Answer 1

Tested

Question 2

How is gender determined

Answer 2

Determined by type of sperm that fertilizes mothers egg. X carrying sperm makes female. Y carrying sperm makes male

Question 3

What is testis determining factor? Location?

Answer 3

Sry gene found only in males. Code for the protein tdf. This initiates development of testes

Question 4

Seminal vesicle

Answer 4

Pair of gland posterior to bladder. Empties into ejaculatory duct. This fluid makes up about 70% of semen

Question 5

Boulbourethral gland

Answer 5

Near bulb of penis. during arousal, produce a clear slippery fluid that lubricates head. Clear out urine before ejaculation

Question 6

Prostate gland

Answer 6

Surrounds urethra. A ejaculatory duct inferior to bladder. Secretion forms 30% of semen.

Question 7

Spermatic cord

Answer 7

Collection of vessels. Nerves and ducts that run to and from the testes. Begins in inferior abdomen and ending in scrotum.

Question 8

Epididymis

Answer 8

Tube that connects testicle to vas deferens

Question 9

Rete testis

Answer 9

A network on the posterior side of the testis that collects sperm from seminiferous tubules

Question 10

Seminiferous tubules

Answer 10

Ducts where sperm are produced.

Question 11

Vas defernes

Answer 11

Muscular tube, passing up from the scrotum though inguinal canal to posterior surface of bladder.

Question 12

Corpus spongiosum

Answer 12

Fills with blood during sexual arousal. Ventral side of penis. Distal end enlarges and forms the glands

Question 13

Corpus cavernosum

Answer 13

Divides into y. Each arm, called a crus, attaches penis to pubic arch. Also fills with blood during arousal

Question 14

Scrotum

Answer 14

Pouch of skin containing testes. Extend anteriorly along central side of penis

Question 15

Cremaster muscle

Answer 15

Strips of the internal abdominal oblique muscle. Regulates temp in scrotum. In cold weather, draws testes upward. In warm weather, relaxes testes further from the body.

Question 16

Paminiform plexus

Answer 16

An extensive network of veins from the testes that surrounds the testicular artery and spermatic cord. Countercurrent heat exchanger. Keeps the testis from getting to warm

Question 17

What is the pathway of sperm cells from formation to ejaculation

Answer 17

Sperm formed in seminiferous tubules. 
Rete testis collects the sperm next. 
Then efferent ductules take it to the duct of epididymis ( site of sperm maturation and storage). 
Vas deferens
Ejaculatory duct

Question 18

What is the function of the blood testis barrier?

Answer 18

Separates sperm from immune system

Question 19

By volume, where is most of the semen produced?

Answer 19

Seminal vesicles form 60% of semen.

Question 20

What type of cells are found in or around seminiferous tubules

Answer 20

Each lined with germinal epithelium cells and sustentacular cells ( promote development)

Interstitial cells- between tubules. Produce testosterone

Question 21

What hormone stimulate development of male secondary sex characteristics?

Answer 21

Gnrh. Stimulates fsh and lh

Question 22

Fsh

Answer 22

Stimulate spermatogenesis

Question 23

Lh

Answer 23

Stimulate interstitial cells to produce testosterone

Question 24

What happens during spermatogenesis

Answer 24

Process of sperm production.

. Division and remodeling of large germ cells into small ones with flagella
. Reduction of chromosome number
. Shuffling of genes so each chromosome contains new gene combination

Spermatognia—spermatogonium—spermatocyte—spermatids—spermiogenesis

Question 25

Spermatogonia

Answer 25

Lie along periphery of seminiferous tubules and divide by mitosis. 1 cell remains in wall (type a). 2nd cell migrates in its way to produce sperm (type 2)

Question 26

Type b spermatogonium

Answer 26

Becomes primary spermatocyte. Each secondary spermatocyte divide into two spermatids

Question 27

Spermiogenesis

Answer 27

Spermatids turn into spermatozoa

Question 28

Where does sperm cells get energy to power their movement?

Answer 28

Atp from the mitochondria