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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
doughnut-shaped gland that encircles part of the urethra inferior to the bladder
prostate
26
PSA
prostate specific antigen
27
fxns of PSA
liquifies semen and sperm, dissolve the mucous cap on cervix.
28
High levels of PSA are associated with
cancer and infection
29
isoPSA can cut unnecessary biopsies by
50%
30
glands that make pre-ejaculate that neutralizes acidic urine in urethra
bulbourethral glands (cowpers)
31
sticky mixture of sperm and accessory gland secretions
semen
32
sperm fed by
fructose
33
decreses viscosity of mucus in cervix
prostaglandins
34
stimulates reverse peristalsis in uterus
prostaglandins
35
antibiotic chemical that destroys certain bacteria
seminalplasmin
36
coagulates semen immediately after ejaculation
clotting factors
37
liquefies the sticky mass
fibrinolysin
38
prepuce
foreskin
39
surrounds the urethra and expands to form the glans and bulb of the penis, keeps urethra OPEN
corpus spongiosum
40
paired dorsal erectile bodies bound by fibrous tunica albuginea
corpora cavernosa
41
erection caused by
PNS reflex promotes the release of nitric oxide, erectile tissue fills with blood
42
average volume of semen per ejaculation
2 to 6 ml
43
average volume of semen per ejaculation
2 to 6 ml
44
average number of times a man will ejaculate in his lifetime
5000
45
average total amount of lifetime ejaculate
17 litres
46
average number of sperm cells in the ejaculate of a healthy man
40 million to 600 million
47
distance sperm travels to fertilize and ovum
7.5 to 10 cm, 3-4 inches
48
sperm lifespace
2.5 mo
49
sperm lifespan after ejaculation
30 seconds to 6 days
50
total sperm travel route
51
somatic cell has how many chromosomes
46, 23 Pairs, DIPLOID, 2N
52
gametes have how many chromosomes
23, haploid, 1N
53
halving chromosomes from 2N to N
Meiosis
54
sperm formation
55
creation of daughter cells from spermatogonium through this process
mitosis, creates type A and type B daughters, A becomes stem cell, B becomes spermatocyte
56
replicating chromosomes
mitosis
57
halving chromosomes
meiosis
58
spermatogenic cells give rise to spemr through these three events
59
Cells that remain at the basement membrane and maintain the germ line
Type A cells
60
cells that move toward the lumen and become primary spermatocytes
Type B cells
61
look at da piture
62
three parts of sperm
63
indirectly stimulates the testes through:  folliclestimulatinghormone[FSH]  luteinizinghormone[LH]
GnRH, gonadotropin releasing hormone
64
which directly stimulate the testes
gonadotropins
65
which exert negative feedback controls
testicular hormones
66
FSH causes sustentacular cells to release
androgen- binding protein [ABP]
67
is the basis of libido in both males and females
T

A+P 1 (12 decks)

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