Ch 27: Male Reproduction Flashcards Preview

A&P II: BIO426 > Ch 27: Male Reproduction > Flashcards

Flashcards in Ch 27: Male Reproduction Deck (55)
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1

True or False

Reproduction plays no role in homeostasis.

True

2

What male reproductive system is responsible for what 3 things?

  1. Production of gametes
  2. Delivery of gametes
  3. Secretion of hormones to support all functions

3

The male reproductive system is composed of...

primary and secondary sex organs.

4

What are the male primary sex organs and what are they responsible for?

  • Testes
  • Production of gametes

5

The secondary male sex organs are?

A sereis of ducts and tubes used for delviery of gametes.

6

What are the main parts of the male reproductive system?

STeSE VUPA

  • Scrotum
  • Testes
  • Seminiferous tubles
  • Epididymus
  • Vas (Ductus) derens
  • Urethra
  • Penis
  • Accessory organs

7

What are the chracteristics of the scrotum?

  • Outer covering of testes
  • Contains smooth muscles for contraction and relaxation

8

Why are the testicles housed externally?

Sperm production reuires a lower body temperature.

9

In what situation would the scrotal muscles contract? Why?

  • If it is cold outside the body.
  • To keep testes warm

10

In what situation would the scrotal muscles relax? Why?

  • When it is warmer outside
  • To keep the testes cooler

11

Testes are the site of...

sperm production

12

What are the two membranes that surround the teste?

  1. Tunica vaginalis
  2. Tunica albuginea

13

What are the characteristics of the tunica vaginalis?

Outer membrane layer of the teste, continuous with the peritoneum

14

What are the characteristics of the tunica albuginea?

Fibrous capusle that penetrates testes and produces lobes

15

Testicular lobes are created by _____ with ______ coiled within each lobe.

tunica albugiea, seminerous tubules

16

Sperm cells are formed with the...

seminiferous tubules

17

What are Leydig's cells?

Interstitial endocrine cells between seminal canals that produce testosterone.

18

What are the uses for testosterone in males?

  • It is an anabolic steroid
  • Development of male reproductive tissues such as testes and prostate
  • Promotes secondary male characteristics such as increased muscle and bone mass, and the growth of body hair

19

True or False

Low testosterone does not cause infertility. 

True

20

True or False

 Sperm production is actually stimulated by hormones other than testosterone. 

True

21

_____ is required for sperm production, but the level in the testes where sperm are produced is many times higher than in the blood.

Testosterone

22

Seminiferous tubules lead into the _____.

rete testis

23

What is the rete tesis?

A tubular network between the seminiferous tubules and the efferent ductules, which lead to the epididymus.

24

What is the flow of sperm from creation to exit?

  • Seminiferous tubles, to
  • Rete testis, to
  • Efferent ductules, to
  • Epididymus, to 
  • Vas deferens, to
  • Ampulla of vas deferens, through
  • Prostate, out the
  • Urethra

25

What are the characteristics of the vas deferens?

  • Long tube that leads from testes back into the body
  • Runs along the vladder until it meets up with the urethra (at the prostate gland)

26

What are the characteristics of the epididymus?

  • Site of maturation of sperm
  • Immature at head and mature as they make their way through the body to the tail of the epididymus
  • Matured sperm are stored in the tail of the epididymus

27

Maturation of sperm as they travel through the epididymus takes...

20 days

28

Sperm stored in the tail of the epididymus are viable for...

40-60 days

29

What happens if sperm are not ejaculated?

They are reabsorbed back into the body.

30

What are the characteristics of the urethra?

  • Long tube leading out of the body
  • Used for urinary and reproductive purposes
  • Carries both urine and semen out of body
  • Made of three parts