Chapter 61

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Which of the following is not an extraembryonic membrane? a. umbilical chord b. amnion c. chorion d. two-cell stage

a. umbilical chord

The____ is the development stage that implants in the endometrium. a. morula b. blastocyst c. zygote d. two-cell stage

b. blastocyst

The embryonic stage of human development exists a. from fertilization until implantation b. through the first 4 weeks of development c. through the first 8 weeks of development d. from fertilization until birth

c. through the first 8 weeks of development

The placenta is comprised of a. only the myometrium b. only the decidua basalis c. only the chorionic villi d. combinations of the decidua basalis and chorionic villi

d. combinations of the decidua basalis and chronic villi

The ovum and sperm unite and form a diploid cell called the a. oronucleus b. blastocyst c. morula d. zygote

d. zygote

A single completed oogenesis sequence produces four functional ova (eggs). true or false

false

A single completed spermatogenesis sequence produces four functional sperm. true or false

true

THe zona pellucida gel layer surronds the secondary oocyte and early developments stages through the morula. true or false

true


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