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83 Cards in this Set
- Front
- Back
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The ductus deferens develops from teh ____of the embryo.
a.mesonephric duct b.paramesonephric duct c.phallus d.labioscrotal folds e.urogenital folds |
a.mesonephric duct
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Descent of the testes is achieved by contraction of a cord called
a.gubernaculum b.the spermatic cord c.the ductus deferens d.the pampiniform plexus e.the rete testis |
a. gubernaculum
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The expulsion of semen occurs when the bulbospongiousus muscle is stimulated by
a.somatic efferent neurons b.somatic afferent neurons c.sympathetic efferent neurons d.parasympathetic efferent neurons e.protaglandins |
a.somatic efferent neurons
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Prior to ejacultaion, sperm are stored primarily in
a.the seminiferous tubules b.the rete testis c.the epididymis d.the seminal vesicles e.the ejaculatory ducts |
c.the epididymis
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The penis is attached to the puic arch by crura of
a.the corpora cavernosa b.the corpus sponginoum c.the perineal membrane d.the bulbocavernosus e.the ischiocavernosus |
a.the corpora cavernosa
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The first hormone secreted at the onset of puberty is
a.fsh b.interstitial cell-stimulating hormone c.human chorionic gonadotropin d.gonadotropin-releasing hormone e.testosterone |
d.gonadotropin-releasing hormone
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When it is necessary to reduce sperm production without reducing testosterone secretion, the sustentacular cells secrete
a.dihydrotestosterone b.androgen-binding protein c.LH d.FSH e.inhibin |
e.inhibin
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Four spermatozoa arise from each
a.primordial germ cell b.type A spermatogonium c.type B spermatogonium d.sedondary spermatocyte e.spermatid |
c.type B spermatogonium
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The point in meisos at which sister chormatids separate from each other is
a.prophase I b.metaphase I c.anaphase I d.anaphase II e.telophase II |
d.anaphase II
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Blood is forced out of the penile lacunae by contraction of the ____ muscles
a.bublocavernosus b.ischiocavernosus c.cremaster d.trabecular e.dartos |
d.trabecular
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Under the influence of androgens, the embyronic____duct develops into the male reproductive tract.
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Mesonephric
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Spermatozoa obtain energy for locomotion from _____ in the semen.
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Fructose
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The_____, a network of veins in the spermatic cord, helps keep the testes cooler than the core body temperature.
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Pampinoform Plexus
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All germ cells beginning with the _____ are genetically different from teh rest of the body cells and therefore must be protected by the bood-testis barrier.
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Secondary spermocytes
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The corpora cavernosa as well as teh testes have a fibrous capsule called the____.
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Turnica albunegia
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Over half of the semen consists of secretions from a pair of glands called the ____.
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Seminal vesicles
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The blood-testis barrier is formed by tight junctions between the_____cells.
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Susentacular
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The earliest haploid stage of spermatogeniss is the _____
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secondary spermatocyte
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Erection of the penis occurs when nitric oxide causes the _____ arteris to dilate.
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Deep
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A sperm penetrates the egg by means of enzymes in its____.
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Acrosome
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The male scrotum is homologous to the female labia majora.
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True
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Sperm cannot develop at the core body temperature.
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True
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Luteinizing hormone stiumlates the testes to secrete testosterone
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True
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The testes and penis are the primary sex organs of the male.
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False, only the testes are primary sex organs
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A high testosterone level makes a fetus develop a male reproductive system, and a high estrogen level makes it develop a female reproductive system.
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False, Female development results from low testosterone levels, not from estrogen
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Most of the semen is produced byt the seminal vesicles.
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True
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The pampiniform plexus serves to keep the tese warm.
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False, it prevents the testes from overheating
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Prior to ejaculation, sperm are stored mainly in the sminal vesicles.
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False, sperm are stored in the epididymis
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Male menopause is the cessation of sperm production around the age of 55.
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False....no such thing!!
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Erection is caused by parasympathetic stimulation of the penile arteries.
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True!
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Of the following organs, the one(s) most compariabel to the penis is (are)
a.the clit b.the vag c.the vestibular bubles d.the labia minora e.the prepuce |
a.the clitoris
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The ovaries secrete all of the following except
a.estrogen b.progesterone c.androgens d.FSH e.inhibin |
d.FSH
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The first haploid stage in oogenesis is
a.the oogonium b.the primary oocyte c.the secondary oocyte d.the second polar body e.the zygote |
c.the secondary oocyte
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FSH secretion begins toe rise and new follicles beging to grow during
a.the premenstrual phase b.the menstural phase c.the preovulatory phase d.the luteal phase e.the plateau phase |
a.the premenstrual phase
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The hormone that most directly influences the secretory phase of the menstrual cycle is
a.HCG b.FSH c.LS d.estrogen e.progesterone |
e.progesterone
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The ischemic phase of the uterus results from
a.rising progesterone levels b.falling progesterone levels c.stiumation by oxytocin d.stimulation by prostaglandins e.stimulation by estrogens |
b.falling progesterone levels
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Before secreting milk, the mammary glands secrete
a.prolactin b. colostrum c.lochia d.meconium e.chloasma |
b.colostrum
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Few women become pregnant while nursing because_____inhibits GnRH secretion.
a.FSH b.prolactin c.prostaglandins d.oxytocin e.HCG |
b.prolactin
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Smooth muscle cells of the myometrium and myoepithelial cells of the mammary glands are the target cells for
a.protaglandins b.LH c.oxytocin d.progesterone e.FSH |
c.oxytocin
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Which of these is not true of the luteal phase of the sexual cycle?
a.progesterone level is high b.the endometrium stores glycogen c.ovulation occurs d.fertilization may occur e.the endometrial glands enlarge |
c.ovulation occurs
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Each egg cell develops in its own fluid-filled space called a/an_____.
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Follicle
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The mucosa of the uterus is called____.
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Endometrium
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a girl's first menstrual period is called____.
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Menarche
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A yellowish structure called the _____ secretes progesterone during the secretory phase of the sexual cycle.
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Corpus luteum
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The first layer of cells around a mature secondary oocyte is the_____.
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Corona radiata
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A secondary follicle differs from a primary follicle in having a cavity called the____.
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Antrum
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Menopause occurs during a midlife period of changing hormone secretion called_____.
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Climacteric
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All the products of fertilization, including the embryo or fetus, the placenta, and the embryonic membranes, are collectively called the____.
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conceptus
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The funnel0like distal end of the uterine tube is called the)_____ and has feathery processes called____.
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Infundibulum, fimbrae
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Postpartum uterine involution produces a vaginal discharge called____.
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Lochia
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After ovulation, a follicle begins to move down the uterine tube to the uterus.
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False, only the ovum and corona radiata eneter the uterine tube, not the follicle
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Human chorionic gonadotropin is secreted by the granulosa cells of the follicle.
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False, HSC is secreted by the placenta
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An oocyte never completes meiosis II unless it is fertilized.
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True
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A slim girl who is active in dance and gymnastics is likely to being menstrauting at a later age than an overweight inactive girl.
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True
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There are more future eggs cells in the ovary at puberty than there are at birth.
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False, many eggs and follicles undergo atresia during childhood, so there number is reduced by the age of puberty
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Women do not lactate while they are pregnant because prolactin is not secred until after birht.
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Prolactin is secreted during prgnancy, but does not induce lactation then.
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Colostrum contains more protein than milk, but less fat.
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True
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Several follicles develop in each ovarian cycle even though only one of them usually ovulates.
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True
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Porgetserone inhibits uterine contractions.
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True
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The entire endometrium is shed in each menstrual period.
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False, only the superficial layer is shed.
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When a conceptus arrives in the uterus, it is at what stage of development?
a.zygote b.morula c.blastomere d.blastocyst e.embryo |
b.morula
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The entry of a sperm nucleus into an egg must be preceded by
a.the cortical reaction b.the acrosomal reaction c.the fast block d.implanation e.cleavage |
b.the acrosomal reaction
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The stage of conceptus that implants the uterus wall is
a.a blastomere b.a morula c.a blastocyst d.an embryo e.a zygote |
c. a blastocyst
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Chorionic villi develop from
a.the zona pellucida b.the endometrium c.the syncytiotrophoblast d.the embryoblast e.the corona radiata |
c.the syncytiotrophoblast
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Which of these results from aneuploidy/
a.turner syndrome b.fetal alcohol syndrome c.nondisjuction d.progeria e.rubella |
a.turner syndrome
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Fetal urine accumulates in the____and contributes to the fluid there.
a.placental siunus byolk sac c.allantois d.chorion e.amnion |
e.amnion
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One theory of snescenece is that it results from a lifetime of damage by
a.teratogens b.aneuploidy c.free radicals d.cytomegaloviurs e.nondisjunction |
c.free radicals
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Photoaging is a major factor in the senescence of
a.the integumentary system b.the eyes c.the nervous system d.the skeletal system e.the cardio vascular system |
a.the integumentary system
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Which of these is not a common effect of senescence?
a.reduced synthesis of vit D b.atrophy of the kidneys c.atrophy of the cerebral gyri d.increased herniation of intervertebral discs e.reduced pulmonary vital capacity |
d.increased hernation of intervetebral discs
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For the first 8 weeks of gestation, a conceptus is noursided manily by
a. the placenta b.amniotic fluid c.colostrum d.decidual cells e.yolk cytoplasm |
d.decidual cells
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Viruses and chemicals that cause congenital anatomical deformities are called_____.
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Teratogens
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Aneuploidy is cased by____, the failure of two homologous chromosomes to separate in meiosis.
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Nondisjunction
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The maximum age attainable by a member of the huma species is called the ____.
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Lifespan
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The average age attained by humans in a give population is called ___.
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LIfe expectancy
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Fetal blood flows through growths called____, which project into the placental sinus.
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Chorionic villi
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The enzymes with which a sperm penetrates an egg are contained in an organelle called the___.
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Acrosome
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Stiffening of the arteries, joints, and lenses in old age may be a result of cross-linking between____ molecules.
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Collagen
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An enlarged tongue, epicanthal folds of the eyes, and mental retardation are characteristic of a genetic anomaly called___.
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Down syndrom
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The fossa ovalis is a remnant of a fetal shunt called the_____.
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Forman oval
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A developing individual is first classified as a/an-_____ when the three primary germ layers have formed.
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Embryo
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Freshly ejaculated sperm are more capable of fertilizing an egg than are sperm several hours old.
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False, sperm require about 10 hoursto become capacitated and able to fertilize an egg.
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Fertilization normally occurs in lumen of the uterus.
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Fertilization occurs in the uterine tube.
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By the time a conceptus reaches the uterus, it has already undergone several cell divisions and consists of 16 cells or more.
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True
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