human reproduction
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human reproduction - Marcador
human reproduction - Detalles
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Preguntas:
118 preguntas
| 🇬🇧 | 🇬🇧 |
| The main function of the mammalian corpus luteum is to produce | Progesterone and estrogen |
| Menstruation is caused by | Fall in progesterone level |
| In humans clevaage divisions are | Slow and asynchronous |
| What connects the testes to epididymis | Vasa efferentia |
| In human female the blastocyst gets implanted | In endometrium by trophoblast cells |
| The second maturation division of the mammalian ovum occurs | Until after the ovum has been penetrated by a sperm |
| Foetal ejection reflex in human female is induced by- | Fully developed foetus and placenta |
| Secretory phase and increased secretion of progesterone | Development of corpus luteum |
| Identical twins will be produced when | One fertilized egg devides into two blastomeres and they become seperate |
| Which cell division is found during clavage | Special mitosis |
| Polar bodies are produced during the formation of | Secondary oocyte |
| Graafian follocle contains | A single oocyte |
| Human egg are | Alecithal |
| Head of epididymis present at head of testis is | Caput epididymis |
| Glands secreting male sex hormone are | Leydig cells |
| The head of mature mammalian sperm is made of | Elongated nucleus convered by acrosome |
| During clevage what is true about embryo | Size does not matter |
| Which male accessory gland is uunpaired | Prostate gland |
| Which of the following is not part of the spermatic chord | Detrusor muscle |
| Semen coagulum forming enzyme is secreted by | Prostate gland |
| Liver is originated from- | Endoderm |
| Acid phosphatase is marker enzyme of- | Prostate gland |
| Accesory sex gland in human male reproductive system are | Bulbo urethral gland |
| Which of the following change does not occur during parturition? | Relaxin contracts the pubic symphysis |
| Which of following sequence followed in human embryology is correct? | Syngamy --->ii meiotic division completed--->karyogamy |
| Which one of the following statements about morula in humans is correct? | It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA |
| Which of the following describes neuronal nitric oxide(NOS) and its action to cause penile erection? | Stimulated by testosterone and parasympathetic system, relaxes muscle |
| Primordial germ cells are originated from | Extragonadial mesoderm |
| Which hormone is secreted only during pregnancy? | HCG,hPL, Relaxin |
| During pregnancy if corpus luteum containing ovary is surgically removed in second trimester than it will lead to | Normal embryonic development |
| What will be the day of ovulation if duration of reproductive cycle in female is of 40 days? | 26th day |
| In some eggs, the future organs can be demarcated as to the regions even before the beginning of cleavage. it is- | Mosaic development |
| Extrusion of second polar body in human's egg occurs- | After the spermatozoon has entered the egg but before the completion of act of fertilization |
| Structures developed from ectoderm are | Skin, lens of eye and nervous system |
| The fast block to polyspermy develops in response to the- | Opening of sodium gates in the plasma membrane |
| Acrosome of sperms is formed by | Golgi bodies |
| Cumulus covers | Ovum |
| Both corpus luteum and macula lutea are | Characterised by a yellow colour |
| The early human embryo distinctly possesses | External ear (pinna) |
| Cleavage divisions bring about | Considerable increase in the mass of protoplasm |
| Women who consumed the drug thaliomide for relief from vomiting during early months of pregnancy gave birth to children with | Under developed limbs |
| Endometrium regenetrates in | 5-10 days |
| Used by sperm to penetrate egg membrane | Hyalurodinase |
| The correct sequence of spermatogenetic stages | Spermatogonia-spermatocyte-spermatid-sperms |
| Morula involves cleavage of cells till 32 cell stage is formed. it is still surrounded by | Zona pellucida |
| Ageing is a result of switching on and off of certain genes. B and T-lymphocytes undergo programmed cell death called apoptosis | Programmed senescence theory of ageing |
| In human adult females oxytocin | Causes strong uterine contractions uring parturition |
| Which of the following is responsible for division of fertilized egg | Proximal centriole of sperm |
| The fertilization cone that pulls the sperm into the egg is formed from the | Plasma membrane of the egg |
| How many eggs and spearms are required to produce fraternal twins | Two eggs, two sperms |
| Which of the choices below is a function of the vagina | Serves as a passageway for menstrual flow, receives semen from the penis during sexual intercourse and is a birth canal |
| In human, the placenta is formed from the_____ of the embryo and______ of the mother | Chorion, endometrium |
| In humans, at the end of the first meiotic division, the male germ cells differentiate into the | Secondary spermatocytes |
| The human sperm was first seen by | Hamm and leeuwenhoek |
| Which one holds corona radiata | Mucopolysaccharide |
| Prostate gland is a | Semen secreting accessory gland of male |
| In gastrulation, which is (are) formed | Ectoderm,mesoderm,endoderm |
| Ovulation in the human female normally takes place during the menstrual cycle | At the end of the proliferative phase |
| In mesolecithal eggs, the cleavage is | Unequal holoblastic |
| The egg of frog is | Telolecithal |
| Antifertilizin is present on | Spermatozoa |