Genetic variation is NOT enhanced through:
A mitosis.
B separation of homologous pairs in Metaphase I.
C fertilization.
D crossing over events.
E mutation.
A
In response to parasympathetic stimulation:
A fertilization is encouraged.
B blood flow increases to the penis.
C vessels in the penis constrict.
D ejaculation occurs.
E spermiogenesis is encouraged.
B
The basic difference between spermatogenesis and oogenesis is that:
A) the mature ovum is diploid and the sperm is 1n.
B) the mature ovum is haploid and the sperm is 2n.
C) one mature ovum is produced in oogenesis, and four mature sperm are produced in sp
C
The organ that makes estrogen and progesterone is the:
A hypothalamus.
B vagina.
C vestibular gland.
D pineal gland.
E ovary.
E
The primary sex organ of the male is the:
A prostate.
B penis.
C testes.
D epididymis.
E seminal vesicle.
C
The reason why the testes are suspended in the scrotum is:
A to reduce the chance of infection from the enteric bacteria.
B to protect sperm from the immune system.
C to place sperm storage sites nearer the penis.
D to create extra space for the sex organ
E
The sperm's acrosome:
A contains nutrients.
B provides the blood-testis barrier.
C has a high density of mitochondria.
D contains enzymes.
E beats, so that the sperm can swim.
D
The surge in LH that occurs during the middle of the ovarian cycle triggers:
A uterine-lining secretion.
B menstruation.
C ovulation.
D FSH release.
E activation of primordial follicles.
C
The usual site of fertilization is the:
A uterus.
B vagina.
C ovary.
D vulva.
E uterine tube.
E
The uterine layer shed with each monthly cycle is the:
A tunica albuginea.
B perimetrium.
C basal layer of endometrium.
D functional layer of endometrium.
E myometrium
D
__________ cells, located between seminiferous tubules, produce testosterone.
A Myometrial
B Interstitial
C Thalamic
D Sustentacular
E Follicle
B
In which uterine phase does the functional layer of the endometrium start to rebuild?
A Ovulation
B Preovulatory
C Proliferative
D Menses
E Secretory
C
What is the most common sexually transmitted disease in the U.S.?
A Gonorrhea
B Chlamydia
C Genital warts
D Syphilis
E Vaginitis
B
Which cell type is actually ovulated from the ovary?
A Oogonium
B Primary oocyte
C Secondary oocyte
D Ovum
E Tertiary oocyte
C
Which is the most correct sequence of sperm flow in the male duct system?
A) Seminiferous tubules, vas deferens, ejaculatory duct, ampulla, urethra
B) Testes, ductus deferens, urethra, seminal vesicle
C) Testes, epididymis, ductus deferens, urethra, semin
D
Which male structure is homologous to the female's clitoris?
A) Scrotum
B) Penis
C) Prostate gland
D) Epididymis
E) Pubis
B
Which represents a correct cascade of reproductive hormones in males?
A FSH, LH, GnRH, testosterone
B FSH, GnRH, testosterone, LH
C LH, GnRH, FSH, testosterone
D FSH, GnRH, LH, testosterone
E GnRH, LH/FSH, testosterone, inhibin
E
Within the ovary, progesterone is produced by the:
A tertiary follicles.
B primary follicles.
C corpus albicans.
D corpus luteum.
E secondary follicles.
D
Sperm are produced in the:
A interstitial cells.
B epididymis.
C prostate.
D seminal vesicles.
E seminiferous tubules.
F spermatic cord.
E
Ovulation in a typical, or "average," cycle usually occurs on day:
A 14
B 5
C 1
D 21
E 28
A
What hormone is responsible for the secondary sex characteristics found in women?
A FSH
B Prolactin
C Progesterone
D Estrogen
E LH
D
If the testes are both removed before puberty, will secondary sex characteristics develop in the male?
A No, they won't develop and the man will be sterile.
B Yes, they will develop, but the man will be sterile.
C Yes, they will develop and the man can pr
A
The muscular wall of the uterus is called the:
A Epimetrium
B Perimetrium
C Endometrium
D Myometrium
D
Which of the following hormones causes the oocyte to mature?
A Estrogen
B Testosterone
C LH
D FSH
D
Which of the following hormones is NOT involved in the regulation of the number of sperm produced in the testes?
A Gonadotropin-releasing hormone
B Inhibin
C Testosterone
D PSA
D
Which of the following statements about myoid cells is true?
A) When they contract, they cause wrinkling of the scrotal skin.
B) They elevate the testes.
C) They surround the seminiferous tubules and contract rhythmically to squeeze sperm and testicular f
C
Which of the following absorb heat from the testes?
A The pampiniform plexus
B The testicular veins
C The interstitial cells
D The testicular arteries
A
Which of the following structures passes through the inguinal canal?
A The ductus deferens
B Epididymis
C The spermatic cord
D The ejaculatory duct
C
Which of the following structures makes up most of the male urethral length?
A Prostatic urethra
B Membranous urethra
C Spongy urethra
D Ejaculatory duct
C
All of the following statements about a vasectomy are true, except:
A) It is 50% reversible because the ligatures will eventually be phagocytized.
B) It is the most effective method of birth control.
C) The part of the ductus deferens that lies in the scr
A
At the start of each new monthly cycle, hundreds of primary oocytes become active.
false
Fimbriae catch ovulated oocytes and direct them into the uterine tubess.
true
High levels of estrogen near the middle of the ovarian cycle positively feed back to the anterior pituitary and cause the LH/FSH surge.
true
One of the roles of sustentacular cells is to prevent immune cell interactions with developing cells.
true
Semen is an alkaline mixture of sperm and gland products.
true
The epididymis is the site of fertilization.
false
The female's external genitalia include the labia minora, labia majora, clitoris, and vagina.
false
The typical ovarian cycle lasts 28 days.
true
There is a constant level of progesterone throughout the monthly cycle.
false
There are 46 chromosomes present in the sperm nucleus.
false
The parasympathetic nervous system causes ejaculation in the male or orgasm in the female.
false
Meiosis occurs only during the production of the sex cells (ovum and sperm).
true
Menopause is caused by the failure of the ovary to produce follicles, release ovum, and produce estrogen.
true
The epididymis functions in the production of testosterone.
false
Crossing over occurs during prophase I.
true
The penis and clitoris are homologues.
true