male reproductive quiz Flashcards

1
Q

only organ system that does not help an organism survive

A

reproductive system

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2
Q

most important parts of the reproductive system

A

gonads

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3
Q

what are gonads

A

organs that produce gametes

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4
Q

what are gametes

A

cells that undergo meiosis and have 1 set of chromosomes, rather than those that undergo mitosis and have 2 sets

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5
Q

what is the penis used for

A

excretion and reproduction

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6
Q

what does the urethra do

A

runs from the bladder to the outside of the body, transporting urine

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7
Q

how is the penis connected to the testes

A

by the vas deferens

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8
Q

what is the glans

A

the head of the penis

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9
Q

the glans has a high concentration of what

A

nerve endings

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10
Q

the glans is generally covered by what

A

the foreskin

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11
Q

when would the glans not be covered by the foreskin

A

if the male is circumcised

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12
Q

how much american males are circumcised

A

roughly 80%

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13
Q

what is the ‘first thing’ that happens when sexually aroused

A

the cavernosal arteries undergo vasodilation

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14
Q

what else happens when sexually aroused

A

the corpora cavernosa fill with blood and the penis becomes larger and rigid

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15
Q

when sexually aroused the engorged corpora cavernosa also what…

A

pushes on and constricts veins, stopping blood from leaving

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16
Q

where are the testes found

A

two testes found inside the scrotum

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17
Q

what is the scrotum

A

a sac

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18
Q

the testes are separated into what

A

left and right

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19
Q

the testes are separated by what

A

the perineal raphe

20
Q

what is the perineal raphe

A

a line of tissue that stretches from the anus to the tip of the penis

21
Q

each testis is split into about how many lobules

22
Q

what are lobules

A

little lobes

23
Q

the lobules of the testes each contain

A

1-4 seminiferous tubules `

24
Q

the seminiferous tubules contain what cell groups

A
  • Leydig cells
  • Sertoli cells
  • spermatogenic cells
25
where does the first step of sperm production happen
in the seminiferous tubules
26
the first step of sperm production takes roughly
65 days
27
how much sperm can begin being produced daily in the seminiferous tubules
100 million sperm
28
sperm make up how much of ejaculate
less than 10%
29
seminal vesicle make up how much of ejaculate
adds 60%
30
seminal vesicle adds what to ejaculate
fructose fibrinogen prostaglandis
31
what does fructose do in ejaculate
the sugar is food for sperm
32
what does fibrinogen do for ejaculate
causes stickiness
33
what does prostaglandins do for ejaculate
they are hormone-like lipids that stop female immune response to sperm
34
prostate fluids are what percent of ejaculate
30%
35
prostate fluids adds what things to ejaculate
zinc and enzymes | alkaline pH
36
what do zinc and enzymes do in ejaculate
activate sperm
37
what does alkaline pH do ejaculate
buffer vagina's acidic pH
38
why do the testes hang below the body
because they function best around 96.5 degress F
39
what is the normal body temp
98.6 degrees F
40
are there many ways the body maintains temperature
yep
41
what is one of main ways body maintains temp of testes
creaster and dartos
42
how does the cremaster and dartos maintain temp
cremaster moves testes (cold) or down (hot). | dartos wrinkles when (cold) or unwrinkles (hot) scrotal skin
43
summary of semen release
``` >>semiferous tubules >>epididymis >>vas deferenns >>seminal vesicle and prostate add components >>urethra ```
44
are sperm continuously produced
yes, even if they are not ejaculated from the body
45
what happens when sperm builds up
sperm are reabsorbed into the body and recycled
46
what happens in a vasectomy
the vas deferens is cut and tied off
47
what happens when the vas deferens is cut and tied off
traps sperm in the epididymis and causing them all to be reabsorbed