The Developing Human: Clinically Oriented Embryology, 9th Edition Test Bank

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Moore:The Developing Human,9thEditionChapter 01:Gametogenesis and FertilizationTest BankMULTIPLE CHOICEDirections: Each group of questions below consists of a numbered list of descriptivewords or phrases accompanied by a diagram with certain parts indicated by letters orby a list of lettered headings. For each numbered word or phrase, select the letteredpart or heading that matches it correctly and then insert the letter in the space to theright of the appropriate number. Sometimes more than one numbered word or phrasemay be correctly matched to the same lettered part or heading.1.________ Haploid nuclei that fuse to form a zygotea.Polar bodyb.Capacitationc.Acrosomed.Zona pellucidae.PronucleiANS:EThe male and female pronuclei are the haploid nuclei of the sperm and oocyte,respectively. They fuse during fertilization to form the diploid nucleus of a zygote.The nucleus occupies most of the head of the sperm, and after it enters the oocyte, itswells to form the male pronucleus. The pronuclei are about equal in size and showsimilar features.2.________ Changes occur in it that inhibit entry of sperma.Polar bodyb.Capacitationc.Acrosomed.Zona pellucidae.PronucleiANS:DThe zona pellucida undergoes changes, called the zona reaction, when a spermcontacts the cell membrane of a secondary oocyte. These changes, caused by therelease of substances from the oocyte, prevent other sperms from passing through thezona pellucida and entering the oocyte.3.________ Contains enzymes that digest a path for the sperma.Polar bodyb.Capacitationc.Acrosomed.Zona pellucida

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