anatomy: chapter 26, the male repro

How many tetrads form during synapsis?

23

Secondary spermatocytes each contain

23 chromosomes

A typical ejaculation releases approximately ________ sperm.

250 million

Arrange the four structures listed below into the order in which sperm pass from the testis to the urethral meatus. 1. ductus deferens 2. urethra 3. ejaculatory duct 4. epididymis

4,1,3,2

The ductus deferens is approximately ________ cm long.

40-45

The reproductive system includes

accessory glands and organs that secrete fluids, ducts that receive and transport gametes, gonads and external genitalia. and organs for copulation. (all of the above)

Nurse cells

are found in the seminiferous tubules, form the blood-testis barrier, and coordinate spermatogenesis. (all of the above)

Which of the following muscles move the testes toward the body?

both the cremaster and dartos muscle

spermatic cord is

bundle of fibrous connective tissue containing the ductus deferens, blood and lymphatic vessels, and testicular nerve

The organ that carries sperm from the epididymis to the urethra is the

ductus deferens (vas deferens)

Spermatozoa are functionally matured within the

epididymis

The organ that monitors and adjusts the composition of tubular fluid, recycles damaged spermatozoa, and is the site of sperm maturation is the

epididymis

A primary spermatocyte matures into ________ spermatids having ________ chromosomes.

four; 23

The urethral meatus is an opening in the

glans penis

The role of FSH in males is to

initiate sperm production in the testes

Testosterone is secreted by the:

interstitial cells

Inward projections of the tunica albuginea, known as septa, divide the testis into

lobules

Which of the following can be found inside the spermatic cord?

lymphatic vessels, blood vessels, ductus deferens, and nerves (all of the above)

The special type of cell division required to produce gametes is called

meiosis

The reproductive system

nourishes, transports, stores, and produces gametes. (all of the above)

identify the corpora cavernosa

number 1

identify the spermatozoa and testosterone

number 3

The organ that delivers semen into the female reproductive tract is the

penis

Sperm are moved along the ductus deferens (vas deferens) by

peristaltic contractions

The fold of skin that covers the glans penis is the

prepuce

The organ that produces a secretion that contains fructose, prostaglandins, and fibrinogen is the

seminal gland ( seminal vesicle)

what structure produces fructose-rich fluid

seminal vesicle

Sperm production occurs in the

seminiferous tubules

Semen contains all of the following except

spermatogonia

Sperm develop from stem cells called

spermatogonia

The process of spermiogenesis produces

spermatozoa

Contraction of the cremaster muscles

tenses the scrotal sac and pulls the testes closer to the body cavity.

interstitial cells produce

testosterone

Contraction of the dartos muscle

tightens the scrotal sac

The dense layer of connective tissue that surrounds the testis is called the

tunica albuginea

identify the corpus spongiosum

underside of penis

The small paired structures at the base of the penis that secrete a thick, alkaline mucus are the

urethral glands

The male reproductive system is most closely associated with which of the following systems?

urinary

interstitial cells

Also called Leydig cells, interstitial cells are located in the testes and secrete testosterone and other androgens. ( all of the above)

The pituitary hormone that stimulates the interstitial cells to secrete testosterone is

LH

The paired erectile bodies in the penis are the

corpora cavernosa

The erectile tissue that surrounds the urethra is the

corpus spongiosum

Functions of the accessory glands of the male reproductive system include all of the following except

production of spermatozoa

Crossing over occurs during ________ of meiosis ________.

prophase; I

The PSA test is used for diagnosis of

prostate cancer

The organ that surrounds the urethra and produces an alkaline secretion is the

prostate gland

The external marking of the boundary between the two testes is the

raphe

identify the scrotum

sac surrounding testicles

The cells that are formed during spermatogenesis by the first meiosis are called

secondary spermatocytes

The nurse cells of the seminiferous tubules do all of the following except

secrete testosterone

Which of the following glands contributes the most volume to semen?

seminal gland