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A+P 1 > Lecture 9 > Flashcards

Lecture 9 Flashcards

1
Q

Testes -> Leydig cells

A

testosterone

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2
Q

smooth muscle that wrinkles scrotal skin

A

dartos

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3
Q

how many degrees cooler are the testes outside the body?

A

3 degree celcius

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4
Q

bands of muslce that lifts the testes

A

cremaster

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5
Q

everything that goes into the scrotum is bundled in the

A

spermatic cord

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6
Q

tunic derived from peritoneum

A

tunica vaginalis

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7
Q

fibrous tunic of testis

A

tunica albuginea

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8
Q

testis divided by septa into how many tubules

A

250-300

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9
Q

each lobule contains how many seminiferous tubules

A

1-4

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10
Q

how many sperm are made

A

1000 per heart-beat

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11
Q

How many sperm are “normal”?

A

20%

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12
Q

tubules converge to for the

A

tubulus rectus

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13
Q

straight tubulus rectus conveys the sperm to the

A

rete testis

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14
Q

Sperm leave the restis via

A

efferent ductules

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15
Q

Sperm enter the

A

epididymis

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16
Q

interstitial cells that surround the seminiferous tubules

A

Cells of Leydig that produce androgens

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17
Q

Factory floor

A

seminiferous tubules

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18
Q

order of sperm travel

A
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19
Q

what happens in epididymis?

A

testosterone-dependent maturation

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20
Q

epididymid holds how many sperm?

A

1 billion

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21
Q

main propulsive force for ejaculation

A

smooth muscle (sympathetic) in tail of spididymis

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22
Q

order of urerthral sections

A

prostatic, membranous, spongy or penile

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23
Q

seminal vesicles produce what volume of semen?

A

60%

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24
Q

viscous alkaline fluid containing fructose, ascorbic acid,
coagulating enzyme [vesiculase], and prostaglandins

A

semen

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25
Q

doughnut-shaped gland that encircles part of the urethra inferior to the bladder

A

prostate

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26
Q

PSA

A

prostate specific antigen

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27
Q

fxns of PSA

A

liquifies semen and sperm, dissolve the mucous cap on cervix.

28
Q

High levels of PSA are associated with

A

cancer and infection

29
Q

isoPSA can cut unnecessary biopsies by

A

50%

30
Q

glands that make pre-ejaculate that neutralizes acidic urine in urethra

A

bulbourethral glands (cowpers)

31
Q

sticky mixture of sperm and accessory gland secretions

A

semen

32
Q

sperm fed by

A

fructose

33
Q

decreses viscosity of mucus in cervix

A

prostaglandins

34
Q

stimulates reverse peristalsis in uterus

A

prostaglandins

35
Q

antibiotic chemical that destroys certain bacteria

A

seminalplasmin

36
Q

coagulates semen immediately after ejaculation

A

clotting factors

37
Q

liquefies the sticky mass

A

fibrinolysin

38
Q

prepuce

A

foreskin

39
Q

surrounds the urethra and expands to form the glans and bulb of the penis, keeps urethra OPEN

A

corpus spongiosum

40
Q

paired dorsal erectile bodies bound by fibrous tunica
albuginea

A

corpora cavernosa

41
Q

erection caused by

A

PNS reflex promotes the release of nitric oxide, erectile tissue fills with blood

42
Q

average volume of semen per ejaculation

A

2 to 6 ml

43
Q

average volume of semen per ejaculation

A

2 to 6 ml

44
Q

average number of times a man will ejaculate in his lifetime

A

5000

45
Q

average total amount of lifetime ejaculate

A

17 litres

46
Q

average number of sperm cells in the ejaculate of a healthy man

A

40 million to 600 million

47
Q

distance sperm travels to fertilize and ovum

A

7.5 to 10 cm, 3-4 inches

48
Q

sperm lifespace

A

2.5 mo

49
Q

sperm lifespan after ejaculation

A

30 seconds to 6 days

50
Q

total sperm travel route

A
51
Q

somatic cell has how many chromosomes

A

46, 23 Pairs, DIPLOID, 2N

52
Q

gametes have how many chromosomes

A

23, haploid, 1N

53
Q

halving chromosomes from 2N to N

A

Meiosis

54
Q

sperm formation

A
55
Q

creation of daughter cells from spermatogonium through this process

A

mitosis, creates type A and type B daughters, A becomes stem cell, B becomes spermatocyte

56
Q

replicating chromosomes

A

mitosis

57
Q

halving chromosomes

A

meiosis

58
Q

spermatogenic cells give rise to spemr through these three events

A
59
Q

Cells that remain at the basement membrane and maintain the germ line

A

Type A cells

60
Q

cells that move toward the lumen and become primary spermatocytes

A

Type B cells

61
Q

look at da piture

A
62
Q

three parts of sperm

A
63
Q

indirectly stimulates the testes through:  folliclestimulatinghormone[FSH]  luteinizinghormone[LH]

A

GnRH, gonadotropin releasing hormone

64
Q

which directly stimulate the testes

A

gonadotropins

65
Q

which exert negative feedback controls

A

testicular hormones

66
Q

FSH causes sustentacular cells to release

A

androgen- binding protein [ABP]

67
Q

is the basis of libido in both males and females

A

T

A+P 1 (12 decks)

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