Male Reproductive System

Question 0

Gonads are —- in men, —- in women

Answer 0

Testes in men, ovaries in women

Question 1

Gametes are:

Answer 1

Mature reproductive cell

Question 2

Male reproductive organs include:

Answer 2

Testes
Ducts
Accessory sex glands
Supporting structures

Question 3

Dartos mm

Answer 3

In scrotum, causes wrinkling

Question 4

Temperature regulation of testes. Why? When? How much?

Answer 4

Sperm survival requires 3 degrees lower temp than core

Cremaster elevates testes it during cold or arousal

Question 5

Where speematogenesis occurs

Answer 5

Seminiferous tubules

Question 6

2 types of sperm development cells in seminiferous tubules

Answer 6

• Spermatogenic cells (become spermatogonia at puberty)

- Sertoli cells (aka sustentacular cells)- support spermatogenesis

Question 7

Blood-testes barrier is formed by—–

Answer 7

Sertoli cells

Question 8

Sertoli cells protect—-
regulate —-
produce —-

Answer 8

Developing sperm
Hormones
Fluid for sperm transport

Question 9

Leydig cells (aka Interstitial cells) produce and secrete:

Answer 9

Androgens, mainly testosterone

Question 10

Testes develop where, descend when?

Answer 10

Near kidneys

To scrotum during 7th month of fetal development

Question 11

Cryptorchidism

Answer 11

Failure of testes to drop (one or both)

Question 12

Pathway of the of sperm through ducts (6)

Answer 12

Seminiferous tubules
Straight tubules
Rete testes
Efferent ducts
Ductus epididymis
Ductus vas deferens

Question 13

What happens in the ductus epididymus

Answer 13

Where sperm is stored (1-2 mos), matures, and either expels toward urethra or degenerated and re absorbed

Question 14

Vasectomy

Answer 14

Male sterilization.
Cut off at vas deferens
Sperm production continues, but degenerates.

Question 15

Ejaculatory duct is a union between —- and —-.

Function is to —–.

Answer 15

Vas deferens duct and seminal vesicles duct

Function: eject sperm and add fluid into prostatic urethra for ejaculation

Question 16

Inguinal canal

Answer 16

Tunnel thru the 3 mms of ant abdominal wall. Where hernias happen

Question 17

Hernia

Answer 17

Rupture or separation of a part of abdominal wall resulting in protrusion of an organ, usually intestine.

Question 18

Prostate secretes an acidic fluid that contains:

Answer 18

• citric acid
• proteolytic enzymes- coagulate and liquefy semen
• seminal plasmin- antibiotic

Question 19

Root of penis is —- and —–.
They continue to become —- and —–.
The whole things covered in —–.

Answer 19

Bulb, crura
Corpus spongiosum, corpus carvernosa
Tunica albugenia.

Question 20

What reflexes cause

• erection
• ejaculation

Answer 20

Erection-parasympathetic

Ejaculation- sympathetic

Question 21

Spermatogenesis

Answer 21

Process of seminiferous tubules producing haploid sperm (65-75 days)

Question 22

Head of sperm

Answer 22

Has acrosome, nucleus. Nucleus has 23 chromosomes

Question 23

GnRH is secreted by the — .

Answer 23

Hypothalamus

Question 24

GnRH stimulates the —– to release what other hormones?

Answer 24

FSH and LH

Question 25

LH stimulates —– cells to produce —– , which later convert to —–.

Answer 25

Leidig cells
Testosterone
DHT

Question 26

FSH, with the help of —-, stimulate —- cells to secrete androgen-binding proteins. All this is a process called ——.

Answer 26

Testosterone
Sertoli cells
Spermatogenesis

Question 27

Once enough spermatogenesis has occurred, what happens?

Answer 27

Set onli cells release inhibin, which DEcreases the FSH in the anterior pituitary.

Question 28

Other than sex related stuff, what does testosterone do?

Answer 28

Stimulates bone growth and protein anabolism

Question 29

When homeostasis is disrupted due to excess testosterone, what happens?

Answer 29

Neg feedback- cells in hypothalamus decrease secretion of gnRH, which decreases LH, then leydig cells produce less testosterone.

Question 30

Male and female reproductive structures develop from:

Answer 30

M: mesonephric (wolffian) ducts
F: paramesonephric (mullerian) ducts

Question 31

If SRY gene is expressed on a Y chromosome, what happens?

Answer 31

Settling cells secrete Mullerian-inhibiting substance(MIS)

Question 32

If sex-determining region Y (SRY) is absent:

Answer 32

Gonads become ovaries

Question 33

Major parts of external genitalia in utero (3):

Answer 33

Labioscrotal swelling
Urethral folds
Glans area

Question 34

What hormone causes male genitalia to develop before birth

Answer 34

DHT: dihydrotestosterone

Question 35

What are in oral contraceptives? What do they do re: brain, hormones?

Answer 35

-estrogen and progesterone. Prevent secretion on FSH and LH by neg feedback on ant pituitary and hypothalamus.