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The yolk sac __________.
- A. forms during the third trimester of pregnancy
- B. is the outer ring of cells that surrounds the blastocyst Copyright ƒâ€š‚© 2018 Laura E. Berk. All Rights Reserved. 3 Test Bank for Berk, Development Through the Lifespan, 7e
- C. produces blood cells until the organs are mature enough to take over this function
- D. contains one large vein that delivers blood loaded with nutrients and two arteries that remove waste
Correct Answer: C
Rationale: The yolk sac is an extraembryonic membrane that plays a significant role in the early development of the embryo. One of its functions is to produce blood cells until the organs are mature enough to take over this function. This process occurs during the early stages of prenatal development to support the growing embryo before it can sustain itself independently.
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During the period of the embryo, the __________ becomes the __________.
- A. mesoderm; nervous system, lungs, internal organs, and skin
- B. chorion; endocrine system, muscles, placenta, and skeleton
- C. ectoderm; circulatory system, skin, skeleton, and internal organs
- D. endoderm; digestive system, lungs, urinary tract, and glands
Correct Answer: D
Rationale: During the period of the embryo, the endoderm becomes the digestive system, lungs, urinary tract, and glands. The endoderm is one of the primary germ layers that give rise to various internal organs in the developing embryo. It plays a crucial role in the formation of organs such as the digestive system, respiratory system, and glandular structures.
Which statement about prenatal rubella is true?
- A. The greatest damage occurs when rubella strikes during the fetal period.
- B. The organ damage inflicted by prenatal rubella can lead to lifelong health problems.
- C. Routine vaccination has made new rubella outbreaks extremely rare worldwide.
- D. Infection during the embryonic period is less harmful than during other prenatal periods.
Correct Answer: B
Rationale: The statement that the organ damage inflicted by prenatal rubella can lead to lifelong health problems is true. Rubella infection during pregnancy can cause serious harm to the developing fetus, including organ damage, deafness, heart defects, and intellectual disabilities. This highlights the importance of prevention and vaccination to protect both pregnant women and their unborn babies from the harmful effects of rubella.
You can tell her that healthy women in their thirties have __________ as those in their twenties.
- A. lower rates of miscarriage
- B. higher rates of pregnancy complications
- C. lower rates of pregnancy complications
- D. about the same rates of pregnancy complications
Correct Answer: D
Rationale: Healthy women in their thirties typically have about the same rates of pregnancy complications as those in their twenties. While it is true that the risk of fertility issues and certain pregnancy complications may increase with age, generally speaking, women in their thirties who are healthy and do not have preexisting conditions do not necessarily experience higher rates of pregnancy complications compared to women in their twenties.
As a generation, the baby boomers are __________ than any previous mid- or late-life cohort.
- A. healthier, but less educated
- B. more educated, but less wealthy
- C. more self-focused, but less healthy
- D. healthier, better educated, and financially better off
Correct Answer: D
Rationale: The baby boomers are healthier, better educated, and financially better off than any previous mid- or late-life cohort. This generation has generally enjoyed higher levels of education, advancements in healthcare, and increased economic opportunities, leading to improved overall well-being compared to earlier generations.
People born during the baby boom between 1946 and 1964 tend to be alike in ways that set them apart from people born at other times due to __________ influences.
- A. age-graded
- B. history-graded
- C. nonnormative
- D. bio-historical
Correct Answer: B
Rationale: People born during the baby boom between 1946 and 1964 tend to be alike in ways that set them apart from people born at other times due to history-graded influences. These influences refer to the events and conditions that are common to a particular historical era and can significantly shape the development and experiences of individuals who live through them. The post-World War II era, economic prosperity, and social changes during the baby boom period are examples of historical events that have had a lasting impact on this generation.