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Chapter 4 Practice Questions

A decreased blood volume b decrease in heart rate c

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A) decreased blood volume B) decrease in heart rate C) decreased urination D) decrease in motility of the gastrointestinal tract Answer: D Topic: MATERNAL CHANGES DURING PREGNANCY 2
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19) The structure responsible for delivering oxygenated blood to the embryo (and later the fetus) from the placenta is the: A) umbilical artery B) umbilical vein C) allantois D) yolk sac Answer: B Topic: DEVELOPMENT OF CHORIONIC VILLI AND PLACENTA 20) Fusion of the neural folds produce the which will eventually give rise to the brain and spinal cord. A) neural plate B) neural groove C) primary vesicles D) neural tube Answer: D Topic: NEURULATION 21) Which of the following structures actually gets implanted into the endometrium of the uterus during implantation? A) blastomeres B) inner cell mass C) trophoblast D) all of the above Answer: D Topic: BLASTOCYST FORMATION 22) The most common site for ectopic pregnancies is the: A) ovaries B) abdominal cavity C) deciduas D) uterine tube Answer: D Topic: IMPLANTATION TRUE/FALSE. Write "T" if the statement is true and "F" if the statement is false. 23) In order for fertilization to occur, sperm must be present in the female sometime during the first 24 hours following ovulation. Answer: TRUE Topic: FERTILIZATION 25) The morula develops into a blastocyst by day five, at which time the embryo enters the uterine cavity. Answer: TRUE 3
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Topic: CLEAVAGE 26) The three main parts of the blastocyst are trophoblast, inner cell mass, and blastocele. Answer: TRUE Topic: CLEAVAGE 27) The syncytiotrophoblast and the cytotrophoblast are two layers of the endometrium that are involved in placenta formation. Answer: FALSE Topic: IMPLANTATION 28) The umbilical cord contains three blood vessels: two umbilical arteries and one umbilical vein. Answer: TRUE Topic: EMBRYONIC AND FETAL DEVELOPMENT 29) The embryonic disc appears first as a bilayered structure of ectoderm and endoderm next to the amniotic cavity. Answer: TRUE Topic: EMBRYONIC AND FETAL DEVELOPMENT 30) The ectoderm of the embryonic disc eventually gives rise to all nervous tissue, the epidermis of the skin, and epithelium of the oral and nasal cavities. Answer: TRUE Topic: EMBRYONIC AND FETAL DEVELOPMENT 31) The time from fertilization to birth is the _____ period, the first two months of which is the _____ period. Answer: gestation, embryonic Topic: EMBRYONIC AND FETAL DEVELOPMENT ESSAY. Write your answer in the space provided or on a separate sheet of paper. 35) Describe the events leading up to and including fertilization, starting after the deposition of the sperm in the female reproductive tract. Answer: The answer should include a description of capacitation of sperm and events leading up to the formation of the segmentation nucleus of the zygote, as found on p. 826. Topic: FERTILIZATION 37) Describe the production and functions of the amniotic fluid. Answer: It is initially formed as a filtrate of plasma from maternal blood, but later
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A decreased blood volume B decrease in heart rate C...

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