组织学自我测试题第十五部分.doc

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1、SELF-ASSESSMENTINHISTOLOGYQUESTIONS十五,MALEREPRODUCTIVESYSTEM1Eachtestisisencapsulatedbyadensefibrousconnectivetissuelayercalledthetunicavaginalis.(F)2Eachtestisisdividedintoapproximately50lobuleseachcontainingaseminiferoustubule.(F)3Theepididymisextend

2、suptheposterioraspectofthetestisandatitsupperpolebecomescontinuouswiththeductusdeferens.(F)4Seminiferoustubulesdrainintotheretetestisfromwhichspermatozoapasstotheepididymisviatheductuliefferentes.(T)5Spermatogenesisistheprocessofmalegameteformation,whe

3、reasspermiogenesisisthetransformationofmalegametesintomaturespermatozoa.(T)6Duringthefirstmeioticdivision,eachchromosomedividesatthekinetochoretoform2chromatidswhichmigratetooppositepolesofthecell.(F)7Chiasmaformationoccursduringthefirstmeioticdivision

4、gametogenesis.(T)8Betweenthefirstandseconddivisionsofmeiosisthechromosomesundergoduplication.(F)9Inthemale,meiosisresultsintheformationoffourhaploidgametesfromeachdiploidgermcell.(T)10Inthemale,primitivegermcellsmultiplycontinuouslybymitosisthroughouta

5、dultlife.(T)11Inmales,primitivegermcellsarereferredtoasspermatocytes.(F)12Primaryspermatocytesarerecognisedbytheircharacteristicnucleiwhicharesmall,condensedandintenselystained.(F)13Whenthesecondmeioticdivisionofspermatogenesisiscompleted,theresultingc

6、elltypeisknownasaspermatid.(T)14Spermiogenesisischaracterisedbyprogressivecondensationofthenucleusanddiminutionofcytoplasmicvolume.(T)15Intheseminiferoustubule,cellsofthespermatogenicseriesaresupportedbyspecialisedepithelialcellsknownasSertolicells.(T)

7、16Sertolicellsarerecognisedinlightmicroscupybytheirlargetriangularorovoidnucleiexhibitingprominentnucleoli.(T)17Ultrastructurally,theSertolicellcyroplasmischaracterisedbyextensiveroughendoplasmicreticulum.(F)18Sertolicellsareusuallyfoundintheinterstiti

8、alspacesbetweenseminiferoustubules.(F)19Duringspermiogenesis,theacrosomalheadcapdevelopsfromavesiclederivedfromtheGolgiapparatusofthespermatid.(T)20Theacrosomalheadcapofthematurespermatozooncontainshydrolyticenzymeswhichareresponsiblefo