CH 25 reproductive system – Flashcards
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Tubular organ that is transected during a vasectomy.
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ductus deferens
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The fluid-filled cavity in a mature ovarian follicle is known as
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antrum.
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This layer of the uterus contracts during parturition to expel the baby.
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myometrium
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The opening of the oviduct is surrounded by these structures.
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fimbriae
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Fertilization of the ovum normally occurs in this region of the oviduct.
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ampulla
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Involuntary contraction of this smooth muscle layer wrinkles and thickens the walls of the scrotum to prevent heat loss.
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dartos muscle
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Tubules that connect testicular lobules with the efferent ductules of the epididymis.
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rete testis
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This multinucleate embryonic structure invades the uterus, digesting cells and maternal blood vessels to make way for development of the placenta.
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syncytiotrophoblast
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Type of cell in the testes that produces testosterone.
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interstitial
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Fingerlike placental structures where oxygen and nutrients from the maternal blood supply diffuse into the embryonic blood.
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chorionic villi
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The usual site of embryo implantation is the
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uterus.
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A factor that propels an oocyte through the uterine tube is
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smooth muscle contraction (peristalsis).
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Sperm become motile in the
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epididymis.
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Which of the following is the primary sex organ in the male?
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the testis
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The correct sequence of sperm-transporting tubules that transport spermatozoa to the epididymis is the
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seminiferous tubule to straight tubule to rete testis to efferent ductule.
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The female homologue of the male scrotum is the
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labia majora.
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A woman's sex cells (germ cells) originate embryologically
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from yolk sac endoderm.
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In cows, the nipples (teats) are in the groin region, not in the midthorax as in humans. What is the most logical reason for this difference between cows and people?
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Cows' mammary glands arise from a different part of the milk line.
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The function of the pampiniform plexus of veins is to
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help cool blood.
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At what point during fetal development is the decidua basalis/chorionic villi collectively referred to as the placenta?
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the start of fourth month
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A woman has developed a cancerous lump in each breast, and the skin of the breasts is dimpled. What structure(s) is (are) causing the dimpling?
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suspensory ligaments of the breast
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All of the following are adaptations for keeping the testes cool except the
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testicular artery.
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The seminal vesicles
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are glands that secrete most of the volume of the semen.
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In breast cancer, the cancer cells usually originate from the
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lactiferous ductules.
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Which testicular cells help deliver sperm to the epididymis by contracting rhythmically?
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myoid
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In the early fetus, all of the following are parts of the chorionic villi except the
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decidua.
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Inguinal hernias
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always enter the inguinal canal.
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Hypospadias
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never occurs in females.
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The function of the cremaster muscle is to
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alter the position of the testes in the scrotal sac with increases in ambient temperature
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By undergoing meiosis, each primary spermatocyte ultimately gives rise to how many sperm cells?
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four
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Of the following tubes, which is the only one that lies partly outside the testis?
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efferent ductule
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Which of the following anchors the uterus into an anteverted position in the pelvis?
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round ligament
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The ovarian cortex consists of
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follicles and connective tissue.
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The female uterine cycle begins
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on the first day of menstruation.
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In addition to remaining granulosa cells, which of the following cell types make up the corpus luteum?
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theca cells
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The largest macroscopic region of the uterus is its
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body.
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The zona pellucida
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is a protective shell around the oocyte that sperm must penetrate for fertilization to occur.
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The prepuce of the clitoris is formed by
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the labia minora.
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The milk-producing cells in the breast are
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simple cuboidal epithelial cells in alveoli.
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In females, the paramesonephric ducts give rise to
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the uterine tubes and uterus.
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) The epithelium lining the vagina is
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stratified squamous.
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The most common site of ectopic pregnancy is the
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uterine tube.
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Which of the following events occurs when the testes do not descend before birth?
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Viable sperm will not be produced.
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Which of the following organs does not contribute secretion(s) during the male sexual response?
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corpus cavernosum
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During the proliferative phase of the uterine cycle, these vessels grow and proliferate.
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spiral arteries
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Which female structure is homologous to the corpus spongiosum of the penis?
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bulb of the vestibule
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Erection is caused by
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erectile bodies filling with blood.
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Sperm are moved into the epididymis from the testis by
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testicular fluid moved by cilia and smooth muscle cells.
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The deep inguinal ring is formed by
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fascia layer deep to the transversus abdominis muscle.
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A hydrocele
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is excess serous fluid in the scrotum.
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A difference between a primary follicle and a primordial follicle is that
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) the primordial follicle has only a single layer of flat follicular cells, whereas the primary follicle is comprised of cuboidal follicle cells.
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67) The acrosomal reaction occurs
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just before fertilization.
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Which structure develops into the umbilical cord?
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body stalk
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The placenta consists of which two structures?
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chorionic villi and decidua basalis
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Which of the following pairs of structures is not derived from the same embryonic tissues?
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ductus deferens, uterine tube
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Which structure is not derived from the embryonic paramesonephric ducts?
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clitoris
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The structural basis of the blood-testis barrier is
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the tight junctions between sustentocytes.
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In the late stages of pregnancy, the placental barrier of the chorionic villi consists only of which two layers?
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syncytiotrophoblast and capillary endothelium
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An episiotomy during childbirth is performed to
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minimize tearing of the central tendon and muscles of the pelvic floor.
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Which of the following statements about pelvic inflammatory disease is incorrect?
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It inhibits ovulation
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All of the following are functions of the sustentocytes in the seminiferous tubules except
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secretion of testosterone.
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The typical (diploid) cells of the body have 46 chromosomes; how many chromosomes does each gamete have?
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23
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All of the following are located within the spermatic cord except the
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superficial inguinal ring.
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The embryonic urethral folds develop into the female
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labia minora.
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The cells that secrete estrogens in females are
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granulosa cells.
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Technically, the theca folliculi is not part of the ovarian follicle, although it is associated with it. Instead, the theca folliculi arises from the
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connective tissue that fills the area between follicles.
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In which part of the uterine tube does fertilization usually occur?
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ampulla
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Most support of the uterus is provided by the
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muscles of the pelvic floor.
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The vaginal fornix
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surrounds the tip of the cervix.
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In an adult woman who has never been pregnant, the breasts have poorly developed or no
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lobules of acini/alveoli.
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The capillaries within a chorionic villus of the placenta contain blood
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from the fetus.
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In males, the paramesonephric (Müllerian) ducts
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degenerate and don't form any structures in males.
