Chapter 27 P1 A and P II

The temperature required for sperm production is:

about 2 degrees below normal body temp

A spermatozoon secretes enzymes from its _____________ to be able to penetrate the egg.

acromosome

Sertoli cells is another name for:

sustentacular cells

The duct of the vas deferens is an extension of the:

tail of the epididymis

The __________________ are not considered to be accesory glands in the male reproductive system.

testes

The tightly coiled duct of the epididymis measures:

18 feet

Which of the following drains the rete testis?

Efferent ductules

Which of the following statements is not true about the fluid produced by the seminal vesicles?

It contains mainly glucose as an energy source for sperm cells

Which of the following is not true of FSH?

It stimulates the secretion of testosterone.

Which of the following structures is not noted for secreting a substance that makes up seminal fluid?

Rete testes

Which of the following is not an effect of testosterone?

Stimulates GnRH secretion by the hypothalamus

In the male, the urethra is: involved in the reproductive system. B. involved in the urinary system. C. can be classified as a genital duct. D. All of the listed items are tru

all of the above

All of the following play a role in thermoregulation of the testes except

the bulbocavernosus muscle.

The lacunae of the corpora cavernosa receive blood directly from

the helecine arteries

The most important factor determining male fertility appears to be the:

the number of sperm ejackulated

The testes receive a poor oxygen supply mainly because

the testicular artery has a very low blood pressure.

Testis-determining factor is coded for by a gene found on

the y chromosome

A routine testicular self-examination for the detection of testicular cancer in men is recommended.

true

Each testis is encased by a white fibrous capsule called the tunica albuginea.

true

Emission is one stage of ejaculation.

true

In the male reproductive system, the vas deferens carries sperm and the pampiniform plexus carries blood.

true

One function of testosterone is to stimulate erythropoiesis.

true

Sperm cells are functionally incomplete at the time of ejaculation.

true

Testosterone has no effect on the testes unless follicle-stimulating hormone is present.

true

The citrate found in secretions of the prostate and seminal vesicles is a nutrient for sperm cells.

true

The dartos and cremaster muscles contract in response to cold temperatures.

true

The perineum in the male extends from the symphysis pubis anteriorly and to the coccyx posteriorly.

true

n enlargement of the prostate may cause urinary retention.

true

The cell which lies along the periphery of the seminiferous tubule and remains outside the blood-testis barrier is

type a spermatogenia

This reproductive duct has thick, muscular walls and can be palpated in the scrotal sac as a smooth, movable cord.

vas deferna

Which of the following divides the testes into lobules?

connective tissue septa

Which term means 'hidden testis?'

cryptorchidism

Which of the following is not a function of the Sertoli cells?

do not produce testosterone

Testosterone A. inhibits the anterior pituitary secretion of FSH and LH. B. helps regulate metabolism and stimulates protein anabolism. C. promotes erythropoiesis D. does all of the items listed.

does all of the items

Vasectomy, a procedure for surgical sterilization of the male, would most likely involve removal of part of the

ductus defernus

Which of the following is not enclosed in the spermatic cord?

ejactulatory ducts

This reproductive duct is divided into the head, body, and tail.

epididymis

The opening of the urethra at the tip of the glans is called the:

external urifieral orifice

A line drawn between the ischial tuberosities divides the perineum into the larger anal triangle and the smaller urogenital triangle.

false

Each testis is divided into 50 to 60 wedge-shaped lobules.

false

In a warm environment, the scrotum elevates and becomes heavily wrinkled, effectively pulling the testes upward toward the body wall.

false

Interstitial(Leydig)cells produce both sperm and testosterone.

false

Leydig cells and Sertoli cells are different names for the same structure.

false

Seminal vesicles convey sperm to the outside of the body.

false

Sertoli cells form tight junctions that divide the wall of the seminiferous tubule into four compartments.

false

Sperm cells leave the tail of the epididymis and move to the rete testis.

false

Spermine is a sugar that provides energy for sperm motility.

false

The ejaculatory ducts pass through the prostate and terminate in the ureter.

false

The nerves that carry sensations from the male genitals constitute the pampiniform plexus.

false

The prostate gland is an aggregate of 130 to 150 compound tubuloacinar glands enclosed in a single fibrous capsule.

false

The scrotum of the male is homologous to the clitoris of the female.

false

The testes and ovaries are collectively called the gametes.

false

The secondary sex organs of the male reproductive system include all the following except:

gonads

Cord that guides the descending testes into the fetal scrotum

gubernaculum

Which of the following statements is not true of the bulbourethral gland? It:

joins the urthera at the prostate gland

Minute blood sinuses in the erectile tissues of the penis

lacunea

The testicular artery is noted for:

low blood pressure

Mitochondria are found in the ________________ of a spermatozoon.

midpiece

Inability to produce this tends to result in impotence

nitric oxide

The cell in spermatogenesis that undergoes meiosis I is

primary spermatocyte

Which of the following cells contain 46 chromosomes?

primary spermocyctes

The urethra runs through the center of the:

prostate gland

The gland that secretes an alkaline substance that constitutes part of the seminal fluid is the:

seminal vesicle

the male gland that secretes fructose used as an energy source by sperm is the:

seminal vesicle

Most of the semen consists of the secretion from

seminal vesicles

Which structure is not found in the scrotum?

seminal vesicles

The genetic sex of a child is determined by

sperm

In the male, LH

stimulates the interstitial cells to increase their secretion of testosterone.

Hypospadias is a birth defect that results from

a urethral opening on the ventral side of the penis.

The dense, white fibrous capsule that encases each testis is called the:

tunic albuginea