Male Reproductive Flashcards

(66 cards)

1
Q

When are the reproductive systems activated?

A

puberty

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2
Q

What are gametes?

A

sperm and eggs

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3
Q

What is the function of the dartos and cremaster muscles?

A

regulate height of the testicles

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4
Q

What temp do the testes like to be?

A

2 degrees cooler than body temperature

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5
Q

What is the function of the seminferious tubules?

A

to produce sperm made from stem cells

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6
Q

Where is testosterone produced?

A

between seminferous tubules; which is then absorbed through the blood

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7
Q

Where is the rete testis?

A

passageway between testes and epididymus

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8
Q

What is the function of the pampiniform plexus?

A

cool the testes by moving blood away and absorbing heat

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9
Q

What is cryptorchidism?

A

failure of the testes to descend to inguinal ring

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10
Q

What are people with cryptorchidism at higher risk for?

A

testicular cancer

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11
Q

The glans penis is an extension of what?

A

corpus sponigosum

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12
Q

What % of american men are circumcised?

A

60%

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13
Q

What goes through the corpus spongiosum? corpus cavernosum?

A

urethra; artery

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14
Q

What does the tunica albuginea do?

A

collagen fibers between erectile tissue that gives the erection direction

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15
Q

What’s the function of the epididymus?

A

where the sperm is matured

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16
Q

How long does it take for sperm to go through the epididymus? How long can sperm be stored here?

A

20 days; can be stored for several months

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17
Q

How does sperm move through duct work during ejaculation?

A

peristalsis

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18
Q

What is a vasectomy?

A

severing of the vas deferens

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19
Q

What is the success rate of a vasectomy? Reversal success rate?

A

100%; 50%

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20
Q

What % of semen do the seminal vesicles produce?

A

60%

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21
Q

What is semen made of? (2)

A

fructose, ascorbic acid (Vitamin C)

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22
Q

What % of semen does the prostate produce?

A

30%

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23
Q

What is the function of the prostate gland?

A

to make the sperm motile (able to move)

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24
Q

What is benine prostate hyperplasia?

A

increased size of the prostate

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25
What does benine prostate hyperplasia cause?
decreased urine flow, due to distorted urethra
26
Prostate cancer is ____ most common cause of cancer death in men
2nd
27
What's the function of the epididymus?
where the sperm is matured
28
How long does it take for sperm to go through the epididymus? How long can sperm be stored here?
20 days; can be stored for several months
29
How does sperm move through duct work during ejaculation?
peristalsis
30
How many sperm are made daily?
400 million
31
What is the success rate of a vasectomy? Reversal success rate?
100%; 50%
32
What % of semen do the seminal vesicles produce?
60%
33
What is semen made of? (2)
fructose, ascorbic acid (Vitamin C)
34
What % of semen does the prostate produce?
30%
35
What is the function of the prostate gland?
to make the sperm motile (able to move)
36
What is benine prostate hyperplasia?
increased size of the prostate
37
What does benine prostate hyperplasia cause?
decreased urine flow, due to distorted urethra
38
Prostate cancer is ____ most common cause of cancer death in men
2nd
39
ED medications do what?
increase the power of nitric oxide
40
What % of semen is made up by sperm?
10%
41
How many sperm per ejaculate?
750 million
42
How many sperm are made daily?
400 million
43
The erection is controlled by spinal nerves from which sacral segments?
2,3,4
44
What chemical is released during an erection via the parasympathetic response?
nitric oxide
45
What happens to the arteries and veins of the penis during an erection?
vasodilation of arteries | vasoconstriction of the veins
46
What muscle contracts to ejaculate sperm?
bulbospongiosus muscle
47
How fast is semen propelled out of the urethra?
11 mph
48
What is the refractory period after a male orgasm? How long does it last?
time between erections, can last between minutes to hours
49
What causes erectile dysfunction?
decrease in nitric oxide
50
What % of men over 40 have some form of ED?
50%
51
ED medications do what?
increase the power of nitric oxide
52
What is the acrosome of the sperm?
clear part around head that contain enzymes to penetrate corona radiata
53
What are homologues?
chromosomes that code for the same information (one from mom, one from dad)
54
When do the chromosomes become unreplicated during spermatogenesis? (single stranded)
after meiosis II
55
Are gametes diploid or haploid?
haploid (23 chromosomes)
56
What occurs during meiosis I?
results in two daughter cells with 23 replicated (double stranded) chromosomes each
57
What occurs during synapsis? (meiosis I)
process which buttons together homologous pairs
58
What forms a tetrad? (meiosis I)
synapsis
59
What are crossovers? (meiosis I)
exchange of genetic material within the tetrad
60
What occurs during meiosis II?
two daughter cells are are split into 4 unreplicated cells with 23 chromosomes each (4 spermatids)
61
During spermatogenesis, what happens to the type A cell?
stays at basement membrane and becomes stem cell, to go through mitosis again
62
During spermatogenesis, what happens to the type B cell?
it becomes the primary spermatocyte
63
The 4 spermatids formed from by meiosis II go through what? What do they become?
spermiogenesis; become 4 individual spermatozoa
64
What is the acrosome of the sperm?
clear part around head that contain enzymes to penetrate corona radiata
65
What does the mid piece of sperm sperm contain?
mitochondria
66
What hormones work together to produce testosterone? What organ produces them?
LH, FSH; anterior pituitary gland