Male Reproductive System Flashcards

1
Q

The pouch that supports the testes

A

Scrotum

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2
Q

Site of sperm cell production

A

Seminiferous tubules

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3
Q

Nourishes sperm cells and releases inhibin; serves as a blood-testes barrier

A

Sertoli or Sustentacular cells

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4
Q

Cells that produce testosterone

A

Leydig or Interstitial Cells

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5
Q

The internal connective tissue divider of the testes

A

Septum

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6
Q

The external scrotum contains what type of tissue?

A

Loose Connective

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7
Q

A smooth muscle responsible for reducing the size of the scrotum

A

Dartus Muscle

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8
Q

T or F: The scrotal muscles contract in warm temperatures and relax in cold temperatures

A

False (contracts in cold, relaxes in warm)

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9
Q

This muscle is an extension of the internal oblique abdominis into the scrotum

A

Cremaster Muscle

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10
Q

T or F: When the cremaster muscle pulls the testes upwards, it raises their body temperature

A

True

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11
Q

Very heat-sensitive cells that must develop at temperatures slightly lower than the rest of the body

A

Sperm Cells

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12
Q

Scrotal temperature is how many degrees lower than the body?

A

2-3 degrees

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13
Q

How many sperm cells complete spermatogenesis every day?

A

300 million

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14
Q

Length of a sperm cell

A

About 60 mm long

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15
Q

T or F: Sperm cells can only survive up to 48 hours within the female reproductive tract

A

True

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16
Q

Part of the sperm cell which contains a nucleus with condensed chromosomes

A

Head

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17
Q

Part of the sperm which covers the anterior 2/3 of the nucleus; filled with enzymes that help the sperm penetrate the egg cell

A

Acrosome

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18
Q

Part of the sperm cell that contains the neck, middle piece, principle piece, and end piece

A

Tail

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19
Q

This portion of the tail contains mitochondria arranged in spirals

A

Middle Piece

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20
Q

This organ belongs to both the reproductive (passage of semen) and urinary system (passage of urine)

A

Penis

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21
Q

Part of the penis that covers the corpora cavernosa and corpus spongiosum

A

Tunica Albuginea

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22
Q

Erectile tissues containing vascular spaces (blood sinuses)

A

Corpora cavernosa

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23
Q

Part of the penis that is pierced through by the urethra

A

Corpus spongiosum

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24
Q

Expanded distal end of the penis

A

Glans penis

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25
Q

Urethra that traverses the corpus spongiosum

A

Penile/Spongy Urethra

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26
Q

Expansion of blood sinuses (pooling of blood) in the corpora cavernosa in response to sexual excitation

A

Erection

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27
Q

The mechanism that releases seminal fluid as a sympathetic reflex

A

Ejaculation

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28
Q

Paired oval glands found within the scrotum

A

Testes

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29
Q

Part of the testes derived from the peritonuem

A

Tunica Vaginalis

30
Q

Medical condition referring to that collection of serous fluid within the tunica vaginalis caused by injury or inflammation (no treatment required)

A

Hydrocele

31
Q

Internal to the tunica vaginalis; extends inwards which creates divisions (septa) for testes compartments (lobules)

A

Tunica albuginea

32
Q

About how many seminiferous tubules are present in one testicular lobule?

A

1-3

33
Q

T or F: Spermiogenesis refers to sperm production

A

False

Spermiogenesis - sperm maturation
Spermatogenesis - sperm production

34
Q

T or F: The process of sperm production and maturation undergoes Meiosis I and II

A

True

35
Q

How many haploid cells are produced from a primary spermatocyte?

A

4

36
Q

Where are the mature sperm cells located within the tubules?

A

Near the lumen

37
Q

Where are the young sperm cells located within the tubules?

A

Near the basement membrane

38
Q

Refers to the youngest form of sperm cells which are diploid cells

A

Spermatogonium

39
Q

T or F: Stem cells completely leave the basement membrane

A

False (they don’t in order to preserve the replication process)

40
Q

Second form of sperm cells after undergoing Meiosis I (still diploid)

A

Primary Spermatocyte

41
Q

Third form of sperm cells after undergoing Meiosis II (turns into haploid)

A

Secondary Spermatocytes (2)

42
Q

Secondary spermatocytes split into what type of haploid cells?

A

4 spermatids

43
Q

When 4 spermatids undergo spermiogenesis, what are produced?

A

4 haploid sperm cells

44
Q

T or F: DNA replication occurs in both primary and secondary spermatocytes

A

False (only happens in primary spermatocytes)

45
Q

Spermatogenesis is induced by what hormone released by the hypothalamus?

A

Gonadotropin-releasing hormone (GnRH)

46
Q

GnRH triggers the anterior pituitary to release what 2 hormones?

A

Follicle stimulating hormones (FSH) and Luteinizing hormones (LH)

47
Q

T or F: FSH stimulates spermatogenesis while LH stimulates testosterone production

A

True

48
Q

Testosterone is reduced to what by the 5-alpha reductase hormone?

A

Dihydrotestosterone

49
Q

Very short reproductive ducts coming from the lumen of the seminiferous tubules

A

Straight tubules

50
Q

Refers to the network of ducts in the testes

A

Rete Testis

51
Q

Series of coiled ducts which empty into the ductus epididymis

A

Efferent Ducts

52
Q

The site of sperm maturation, storage, and where sperm cells learn how to swim

A

Epididymis

53
Q

T or F: Unejaculated sperm will be reabsorbed

A

True

54
Q

The duct which ascends from the epididymis to the spermatic cord towards the pelvic cavity

A

Vas deferens/ Ductus deferens

55
Q

The vas deferens conveys the sperm during sexual arousal by means of what muscular movement?

A

Peristalsis

56
Q

T or F: The vas deferens is the organ being cut during a vasectomy

A

True

57
Q

Supporting structure that houses the veins and arteries and arises from the scrotum

A

Spermatic Cord

58
Q

Other name for testicular veins

A

Pampiniform plexus

59
Q

Medical condition referring to the swelling of the scrotum due to a dilation of veins that drain the testes (does not require treatment)

A

Varicocele

60
Q

Formed by the union of 2 ducts (seminal vesicles and vas deferens ampulla)

A

Ejaculatory Duct

61
Q

Enlargement at the tip of the vas deferens posterior to the urinary bladder

A

Ampulla

62
Q

Shared terminal duct for both the reproductive and urinary system

A

Urethra

63
Q

The accessory gland that secretes alkaline and viscous fluid which contains fructose, prostaglandins, and clotting proteins

A

Seminal Vesicles

64
Q

The percentage of seminal fluid made in the seminal vesicles

A

65-70%

65
Q

Doughnut-shaped accessory organ which secretes a milky, slightly acidic fluid (pH = 6.5)

A

Prostate Gland

66
Q

The antibiotic that decreases the naturally occurring bacteria in semen

A

Seminalplasmin

67
Q

The percentage of seminal fluid made in the prostate glands

A

20%

68
Q

Smallest accessory organ which secretes an alkaline fluid in the urethra that protects passing sperm by neutralizing acids from urine

A

Bulbourethral Glands/Cowper’s Glands

69
Q

The percentage of seminal fluid made in the bulbourethral glands

A

10%

70
Q

T or F: The bulbourethral glands contain sperm cells

A

False

71
Q

Mixture of sperm and seminal fluid

A

Semen