Reproductive system part 1 Flashcards


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created 8 years ago by nshe309
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Basic Male reproductive system
updated 8 years ago by nshe309
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biology, reproductive system, reproduction
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1

The master switch gene

SRY region on the Y chromosome.

2

Role of SRY

Allows testes to develop.

3

Mullerian ducts are found in

Females

4

Wolffian ducts are found in

Males

5

Before sex differentiation we all have

Urethral folds, urethral groove, genital tubercle, and labioscrotal swelling.

6

DHT stimulates

development of urethra, prostate, and external genitals.

7

Sertoli cells secrete an

Anti-mullerian hormone, regression of mullerian ducts.

8

Leydig cells secrete

Testosterone, supports development of wolffian ducts.

9

Glans area in males form into

Glans penis.

10

Labioscrotal swelling in males form into

Scrotum.

11

Urethral folds in males form into

The shalt of the penis.

12

What is the first sign of puberty?

Increased LH levels at night.

13

First characteristic of the male to develop in puberty

Testes develop.

14

Second characteristic of the male to develop in puberty

Pubic hair development.

15

Third characteristic of the male to develop in puberty

Penile development.

16

Fourth characteristic of the male to develop in puberty

Height spurt.

17

Sperm production occurs in

The seminiferous tubules within the testes.

18

Sertoli cell role in spermatogenesis

Support and provide nutrients to dividing cells.

19

Spermatogonia are

Sperm stem cells that are 2(n).

20

Spermatogonia cells divide by mitosis to give

Two daughter cells, one will remain in the basement membrane as a spermatogonium and the other will become a primary spermatocyte.

21

The primary spermatocyte divides by

Meiosis I into a secondary spermatocyte with (n).

22

The secondary spermatocyte divides by

Meiosis II into an early spermatid.

23

Role of duct system in males

Transports and stores sperm, assists in maturation and coveys them into the exterior.

24

Parts of the scrotum

Scrotal septem, dartos muscle, and cremaster muscle.

25

Scrotal septem

Divides the two sacs.

26

Dartos muscle

Bundles of smooth muscle in subcutaneous layer of scrotum.

27

Cremaster muscle

skeletal muscle, surrounds the testes and is extension of internal oblique muscle.

28

Parts of the testes

Tunica vaginalis, lobules, seminiferous tublues, and sertolicells.

29

Tunica vaginalis

A serous membrane that partially covers the testes.

30

Lobules

Contain seminiferous tubles.

31

Acrosome

A cap like resicle filled with enzymes to penetrate the oocyte to bring about fertilization.

32

The tail consists of

The neck, middle piece (contains mitochondria), principle piece (longest part of the tail) and the end piece.

33

What is the basis of how males get secondary sexual characteristics?

HPG axis - hypothalamus, (anterior) pituitary and gonads.

34

What is the role of the hypothalamus in the development of secondary sexual characteristics?

Releases GnRH onto the anterior pituitary gland.

35

What is the role of the anterior pituitary gland in the development of secondary sexual characteristics?

Releases FSH and LH once stimulated by the hypothalamus.

36

What is the role of LH in the development of secondary sexual characteristics?

Acts on the leydig cells which produce and release testosterone.

37

enzyme 5 alpha reductase converts..

Testosterone into DHT.

38

Role of inhibin?

Inhibits FSH when FSH levels reach too high.

39

Role of FSH in a male

Acts as an androgen binding protein. This protein carries lipid-soluble hormones around the blood.

40

What is in place to stop testosterone levels reaching too high?

A negative feed back system, when the level reaches too high it inhibits the amount of GnRH released in the hypothalamus acting on the anterior pituitary. This in turn reduces the amount of LH and FSH produced.