The dartos and cremaster muscles are important to the integrity of the male reproductive system. Which of the following is true about the role they play?
A) They contract to allow ejaculation.
B) They contract to push sperm along the ductus deferens.
C) T
D) They regulate the temperature of the testes.
The ability of sperm cells to move along the ductus deferens is due to ________.
A) enzymatic activity
B) hormonal action
C) peristaltic contractions
D) gravity
C) peristaltic contractions
The ability of a male to ejaculate is due to the action of ________.
A) parasympathetic nerves
B) luteinizing hormone
C) the bulbospongiosus muscles
D) the dartos muscle
C) the bulbospongiosus muscles
The most important risk for testicular cancer in young males is ________.
A) smoking
C) sexually transmitted infections
B) nondescent of the testes
D) a diet high in fat
B) nondescent of the testes
Which of the following glands are responsible for 60% of the synthesis of semen?
A) the pituitary
B) the prostate
C) the bulbourethral glands
D) the seminal vesicles
D) the seminal vesicles
Which of the following hormones controls the release of anterior pituitary gonadotropins?
A) testosterone
B) GnRH
C) LH
D) FSH
B) GnRH
Development of male reproductive structures depends on which of the following events?
A) that the female hormones are suppressed during pregnancy
B) the suppression of inhibin
C) that human gonadotropin be synthesized in the first week of the pregnancy
D)
D) secretion of male hormones prenatally and lasting into the first few months after birth
The primary function of the uterus is to ________.
A) receive, retain, and nourish a fertilized ovum
B) synthesize female hormones
C) protect the ovaries
D) regulate the ovarian and menstrual cycles
A) receive, retain, and nourish a fertilized ovum
Why is the blood-testis barrier important?
A) because immature sperm cells lose their motility when they encounter any blood component
B) because some blood contents are toxic to the spermatozoa
C) because spermatozoa and developing cells produce surface
C) because spermatozoa and developing cells produce surface antigens that are recognized as
foreign by the immune system
The structures that receive the ovulated oocyte, providing a site for fertilization, are called the ________.
A) fallopian tubes
B) infundibula
C) Graafian follicles
D) fimbriae
A) fallopian tubes
If gametes were diploid like somatic cells, how many chromosomes would the zygote contain?
A) twice the diploid number, and with every succeeding generation, the chromosome number
would continue to double and normal development could not occur
B) half the
A) twice the diploid number, and with every succeeding generation, the chromosome number
would continue to double and normal development could not occur
Human egg and sperm are similar in that ________.
A) they have the same number of chromosomes
B) they have the same degree of motility
C) about the same number of each is produced per month
D) they are about the same size
A) they have the same number of chromosomes
The constancy of the chromosome number from one cell generation to the next is maintained through ________.
A) DNA synthesis
B) cytokinesis
C) mitosis
D) meiosis
D) meiosis
Fertilization generally occurs in the ________.
A) fallopian tubes
B) ovary
C) vagina
D) uterus
A) fallopian tubes
Spermiogenesis involves the ________.
A) formation of four haploid cells from a spermatogonium
B) formation of a functional sperm by the stripping away of superfluous cytoplasm
C) sequence of events in the rete testis
D) movement of sperm in the female ge
B) formation of a functional sperm by the stripping away of
All of the following can be considered male secondary sex characteristics except the ________.
A) increasing mass of the skeleton
c
C) lowering of the voice
D) development of body hair
...
In humans, separation of the cells at the two-cell state following fertilization may lead to the production of twins, which in this case would be ________.
A) identical
B) fraternal
C) of different sexes
D) dizygotic
A) identical
Characteristics of the mature sperm include the ________.
A) presence of Y chromosomes in approximately half the sperm
B) absence of coiled mitochondria
C) absence of an acrosome
D) presence of two X chromosomes in approximately half the sperm
A) presence of Y chromosomes in approximately half the sperm
How do the testes respond to exposure to excessive body warmth?
A) Excessive warmth is actually beneficial in that it speeds up the maturation of sperm.
B) Excessive warmth has no effect on the testicles because of their location in the scrotum.
C) They m
C) They move away from the pelvic cavity.
Effects of estrogen include ________.
A) increased oiliness of the skin
B) deepening of the voice
C) growth of the larynx
D) growth of the breasts at puberty
D) growth of the breasts at puberty
Secretion of progesterone stimulates ________.
A) preparation of the mammary glands for lactation
B) contraction of uterine muscles
C) development of the female secondary sex characteristics
D) secretory activity of the uterine myometrium
A) preparation of the mammary glands for lactation
Which of the following statements about sperm is not true?
A) The sperm midpiece consists of mitochondria spiraled tightly around the contractile filaments
of the tail.
B) They contain very little cytoplasm or stored nutrients.
C) The acrosome is produced
A) The sperm midpiece consists of mitochondria spiraled tightly around the contractile filaments
of the tail.
The cells that produce testosterone in the testis are called ________.
A) sustentacular cells
B) interstitial cells
C) spermatogonia
D) spermatocytes
B) interstitial cells
The testicular cells that construct the blood-testis barrier are the ________.
A) spermatocytes
B) interstitial cells
C) sustentacular cells
D) spermatogonia
C) sustentacular cells
Which of the following occurs as a result of undescended testes?
A) Sperm will have no means of exit from the body.
B) Inadequate or nonviable sperm will be produced.
C) Inadequate blood supply will retard the development of the testes.
D) Male sex hormon
B) Inadequate or nonviable sperm will be produced.
Erection of the penis results from ________.
A) parasympathetic activation of the bulbourethral glands
B) a sympathetic reflex
C) dilation of the veins in the penis
D) a parasympathetic reflex
D) a parasympathetic reflex
Which is not a part of the proliferative phase of the female menstrual cycle?
A) vesicular follicle growth
B) development of endometrial cells
C) corpus luteum
D) late in this phase, cervical mucus becomes thin and crystalline
C) corpus luteum
Which of the choices below is not a function of the vagina?
A) is the birth canal
B) serves as a passageway for the primary oocyte
C) receives semen from the penis during sexual intercourse
D) serves as a passageway for menstrual flow
B) serves as a passageway for the primary oocyte
Select the correct statement about male sexual response.
A) Erection is the result of vascular spaces in the erectile tissues filling with blood.
B) Sympathetic impulses are responsible for causing penile arteriolar dilation, resulting in erection.
C) Eja
A) Erection is the result of vascular spaces in the erectile tissues filling with blood.
Which of the choices below is not a function of testosterone?
A) contributes to male sexual behavior and spermatogenesis
B) stimulates the male pattern of development
C) stimulates protein synthesis
D) stimulates mammary gland development
D) stimulates mammary gland development
Which male hormone inhibits the secretion of FSH?
A) ICSH
B) inhibin
C) testosterone
D) ACTH
B) inhibin
During the secretory phase of the menstrual cycle ________.
A) LH reaches its highest levels
B) the Graafian follicle forms
C) estrogen reaches its highest levels
D) progesterone levels are at their highest
D) progesterone levels are at their highest
Select the correct statement about the uterine cycle.
A) The menstrual phase of the cycle is from day 1 to day 8.
B) During the proliferative phase, levels of progesterone rise as the follicle begins to produce more hormone.
C) If fertilization occurs, th
C) If fertilization occurs, the corpus luteum is maintained by a hormone secreted by the developing embryo.
Which of the choices below is not a part of the brain-testicular axis?
A) hypothalamus
B) anterior pituitary gland
C) testes
D) thalamus
C) testes
Which of the following statements is true concerning the mammary glands of both males and females?
A) Both sexes are equally prone to breast cancer.
B) The mammary glands are modified sweat glands that are actually part of the integumentary
system.
C) The
B) The mammary glands are modified sweat glands that are actually part of the integumentary
system.
Normally menstruation occurs when ________.
A) blood levels of estrogen and progesterone increase
B) blood levels of FSH fall off
C) the corpus luteum secretes estrogen
D) blood levels of estrogen and progesterone decrease
D) blood levels of estrogen and progesterone decrease
The basic difference between spermatogenesis and oogenesis is that ________.
A) the mature ovum is n, while the sperm is 2n
B) in oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperm are produced from the parent cell
C) spermat
B) in oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperm are produced from the parent cell
Occasionally three polar bodies are found clinging to the mature ovum. One came from an unequal division of the ovum, but from where did the other two arise?
A) There were originally four polar bodies and one disappeared.
B) The first polar body has also
B) The first polar body has also divided to produce two polar bodies.
Which of the following will occur after ovulation?
A) The secretion of anterior pituitary gonadotropins is enhanced.
B) The corpus luteum prepares to become a corpus albicans.
C) The endometrium enters its secretory phase.
D) The corpus luteum secretes es
C) The endometrium enters its secretory phase.
Why doesn't semen enter the urinary bladder during ejaculation?
A) The smooth muscle sphincter at the base of the urinary bladder closes.
B) There is no urge to urinate during sexual intercourse because of the suppression of LH by testosterone buildup in
A) The smooth muscle sphincter at the base of the urinary bladder closes.
Spermatogenesis ________.
A) is the process of releasing mature sperm cells into the lumen of the seminiferous tubule
B) results in the formation of diploid cells
C) involves a kind of cell division limited to the gametes
D) uses mitosis to produce gamete
C) involves a kind of cell division limited to the gametes
Which hormone is absolutely necessary for ovulation to occur?
A) FSH
B) progesterone
C) LH
D) estrogen
C) LH
The brain-testicular axis ________.
A) involves a positive feedback loop control of spermatogenesis
B) is the tight relationship between the cortex and the control of testicular function
C) involves posterior pituitary release of regulating hormones
D) in
D) involves FSH and LH release
Select the correct statement about testosterone control.
A) The pineal gland is believed to be the gland that exerts the most influence in testosterone
control.
B) FSH stimulates testicular production of testosterone.
C) GnRH from the hypothalamus causes
C) GnRH from the hypothalamus causes FSH and LH release from the anterior pituitary.
Which of the following is a correct statement about uterine tubes?
A) The isthmus is the normal site of fertilization.
B) The ampulla is the narrow constricted region.
C) The mesometrium supports the uterine tubes along their entire length.
D) The infundi
D) The infundibulum is the funnel-shaped region near the ovary.
Select the correct statement about the hormonal events of the ovarian cycle.
A) Rising levels of estrogen start follicle development.
B) The follicle begins to secrete progesterone in response to estrogen stimulation.
C) High estrogen levels result in a s
C) High estrogen levels result in a surge of LH release.
Which of these statements about sexually transmitted infections is false?
A) Chlamydia is caused by bacteria that can often be asymptomatic or bring on a wide variety of
symptoms.
B) Syphilis is caused by a virus that may lead to death if untreated.
C) Go
B) Syphilis is caused by a virus that may lead to death if untreated.
Which of the following statements about spermatogenesis is not true?
A) The secondary spermatocytes each form two spermatids.
B) Each spermatid forms two sperm.
C) The primary spermatocyte forms two secondary spermatocytes.
D) The spermatogonium forms the
B) Each spermatid forms two sperm.
A boy who has not passed through puberty sustains an injury to his anterior pituitary such that FSH is no longer released, but LH is normal. After he grows to maturity, one would expect that he
would ________.
A) be impotent (unable to have an erection)
B
D) be sterile
Which of the following statements about the female reproductive process is not true?
A) The monthly discharge of the uterus (menses) is initiated by the decrease in secretion of
female hormones.
B) Rebuilding the endometrium is under the control of prolac
B) Rebuilding the endometrium is under the control of prolactin.
A low secretion of luteinizing hormone (LH) in the normal male adult would cause ________.
A) increased spermatogenesis
B) excessive beard growth
C) shrinkage of the anterior pituitary gland
D) decreased testosterone secretion
D) decreased testosterone secretion
All of the following statements referring to the uterine cycle are true except ________.
A) estrogen is secreted by the developing follicle in the follicular phase of the cycle
B) a decrease in the levels of ovarian hormones signals menstruation
C) the co
D) FSH and LH directly promote development of the uterine endometrium
Which of the following phases or processes in the monthly reproductive cycle of the female occur simultaneously?
A) maximal steroid secretion by the corpus luteum and menstruation
B) early follicular development and the secretory phase in the uterus
C) re
C) regression of the corpus luteum and a decrease in ovarian progesterone secretion
The duct system of the male reproductive system includes the ________.
A) urethra
B) ductus deferens
C) epididymis
D) corpus spongiosum
D) corpus spongiosum
An ovulating oocyte is actually activated by hormones about ________ days before ovulation.
A) 85
B) 110
C) 28
D) 14
B) 110
Prostate cancer is _______.
A) the number-one cause of death in men
B) often the result of a distortion of the urethra
C) most common in Asians
D) sometimes a slow-growing cancer that may never represent a threat to the patient
D) sometimes a slow-growing cancer that may never represent a threat to the patient