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Biology 139 > Chapter 27 > Flashcards

Chapter 27 Flashcards

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0
Q

Is a milky white, somewhat sticky mixture of sperm, testicular fluid, and accessory gland secretions.

A

Semen

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1
Q

Are pea-sized glands located inferior to the prostate in the urogenital diaphragm?

A

Bulbourethral glands

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2
Q

The normal chromosome number in most body cell is the ___ ___ __ of the organism, symbolized as 2n.

A

Diploid chromosomal number

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3
Q

___ is the sequence of events in the seminiferous tubules of the testes that produces male gametes.

A

Spermatogenesis

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4
Q

The diploid chromosomal number is _

A

46

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5
Q

Diploid cells contains 23 pairs of similar chromosomes called

A

Homologous chromosomes

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6
Q

The number of chromosomes in human gametes is ____ referred to as the _____ _____ _____ or n.

A

23

Haploid chromosomal number

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7
Q

What is the copulatory organ designed to deliver sperm into the female reproductive tract called?

A

Penis

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8
Q

Gamete formation in both sexes involves _____ a unique kind of nuclear division that for most part occurs only in the gonads.

A

Meiosis

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9
Q

Enlargement and stiffening of the penis, results from engorgement of the erectile bodies with blood? (Parasympathetic control)

A

Erection

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10
Q

Is the propulsion of semen from the male duct system. (Sympathetic control)

A

Ejaculation

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11
Q

Is a single doughnut shaped gland about the size of a peach pit?

A

Prostate

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12
Q

_____ Is the terminal portion of the male duct system. It conveys both urine and semen.

A

Urethra

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13
Q

The cup shaped _____, head contains the efferent ductules caps the superior aspect of the testis.

A

Epididymis

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14
Q

Runs upward as part of the spermatic cord from the epididymis through the inguinal canal into the pelvic cavity.

A

Ductus deferens or vas deferens

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15
Q

Lie on the posterior bladder surface? (70% of the volume of semen)

A

Seminal glands

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16
Q

________ contains mitochondria spiral tightly around the microtubules of the tail?

A

Midpiece

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17
Q

_____ _____ include the paired seminal glands, and bulbourethral glands, and the single prostate.

A

Accessory glands

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18
Q

Extends from the basil lamina to their tight junctions and contains spermatogonia and the earliest primary spermatocytes?

A

Basal compartment

19
Q

Make up most of the penis and are bound by the fibrous tunica albuginea. Their proximal end form the crura of the penis. (Paired dorsal erectile bodies)

A

Corpora cavernosa

20
Q

The tight junctions between the sustenocytes form the what?

A

Blood testis barrier

21
Q

The skin covering the penis is loose and when it slides distally if forms a cuff called??

A

Prepuce or foreskin

22
Q

A layer of smooth muscle in the superficial fascia, wrinkled the scrotal skin?

A

Dartos muscle

23
Q

________ suspends the scrotum and contains the root of the penis and the anus “it is the diamond shaped region located between the public symphysis anteriorly”

A

Perineum

24
Q

Bands of skeletal muscle that arise from the internal oblique muscles of the trunk, elevate the testes?

A

Cremaster muscles

25
Q

The sperm producing _____ lie within the scrotum.

A

Testes (male gonads)

26
Q

A sac of skin and superficial fascia that hangs outside the abdominopelvic cavity at the root of the penis.

A

Scrotum

27
Q

__ __ are steroid hormones secreted by gametes.

A

Sex hormones

28
Q

Are the tested in male and ovaries in females.

A

Gonads

29
Q

Ducts, glands, and external genitalia are the?

A

Accessory reproductive organs

30
Q

Lying in the soft connective tissue surrounding the seminiferous tubules are the? (Produce androgens)

A

Interstitial endocrine cells (leydig cells)

31
Q

Sperm can be produced at ___ than the body temperature.

A

3degrees C

32
Q

The __ __ derived from the peritoneum and surrounds each of the testes.

A

Tunica vaginalis

33
Q

Septa divide the testis into a 250-300 lobules, each containing 1-4 __ __

A

Seminiferous tubules

34
Q

The epithelium consist of sphenoid __ __. (Sperm forming)

A

Spermatogenic cells

35
Q

The surgical removal of the prepuce is ___

A

Circumcision

36
Q

Encloses nerve fibers blood vessels and lymphatics that supply the testis

A

Spermatic cord

37
Q

Blood supply comes from testicular _____ & _____

A

Arteries

Veins

38
Q

Sperm are delivered to the exterior through a system of _____

A

Ducts

39
Q

Enzymes that allow sperm to penetrate the egg are located in the ______ of the sperm cell

A

Acrosome

40
Q

The testicular cells that construct the blood testis barriers are the?

A

Sustenocytes

41
Q

The release of ______ encourages interstitial endocrine to release _____

A

Lh

Testosterone

42
Q

Which is housed within the spermatic cord?

A

Testicular artery and veins

43
Q

At what point During meiosis do homologous chromosomes pair up?

A

Prophase 1

44
Q

Sperm is produced in the ______ __ of the testes

A

Seminiferous tubules

Biology 139 (10 decks)

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