the ectoderm becomes the

ATI RN

Human Growth and Development Final Exam Answers

1. During prenatal development, the ectoderm becomes the __________.

A. muscles and skeleton
B. nervous system and skin
C. circulatory system and other internal organs
D. digestive system, lungs, urinary tract, and glands

Correct answer: B

Rationale: The correct answer is B: nervous system and skin. The nervous system, which includes the brain, spinal cord, and nerves, as well as the skin, develop from the ectoderm layer of cells during prenatal development. Choice A is incorrect because muscles and skeleton develop from mesoderm. Choice C is incorrect because the circulatory system and other internal organs develop from mesoderm and endoderm. Choice D is incorrect because the digestive system, lungs, urinary tract, and glands develop from endoderm.

2. According to the lifespan perspective, _______ is supreme in its impact on the life course.

A. the prenatal period
B. early childhood
C. adolescence
D. no age period

Correct answer: D

Rationale: According to the lifespan perspective, no single period is considered supreme in its impact on the life course. Each stage of life, from prenatal period through adulthood, plays a significant role in shaping an individual's development. Therefore, the correct answer is 'D: no age period.' Choices A, B, and C are incorrect because the lifespan perspective emphasizes that all stages are important and contribute uniquely to an individual's life course.

3. How were baby boomers generally perceived by popular culture and media?

A. They were more economically underprivileged than their counterparts in the previous generation
B. They adopted their parents' family- and marriage-centered lifestyles in early adulthood
C. They embraced growing old far more than their predecessors
D. They were labeled a narcissistic, indulged, 'me' generation

Correct answer: D

Rationale: The statement that baby boomers were labeled a narcissistic, indulged, 'me' generation aligns with the common perception of this generation in popular culture and media. Baby boomers, who were born between 1946 and 1964, have often been characterized in this way due to their reputation for self-centeredness and individualism. Choices A, B, and C are incorrect because they do not accurately reflect the typical perception of baby boomers in popular culture and media.

4. Which statement about the harm done by teratogens is true?

A. Passive smoking can be harmful to the developing fetus.
B. The genetic makeup of the mother and the developing organism plays an important role.
C. The negative impact of teratogens is usually reversible.
D. The most serious defects occur in the germinal period.

Correct answer: B

Rationale: The statement that the genetic makeup of the mother and the developing organism plays an important role in the harm done by teratogens is true. Genetic factors can influence susceptibility to teratogens, and the interaction between genetic and environmental factors plays a significant role in determining the impact on the developing fetus. This highlights the importance of considering both genetic and environmental influences when assessing risks to prenatal development. Choice A is incorrect as passive smoking can indeed be harmful to the developing fetus. Choice C is incorrect as the negative impact of teratogens is often not reversible. Choice D is incorrect as serious defects can occur throughout prenatal development, not just in the germinal period.

5. Fraternal twins are ____________.

A. genetically identical
B. no more alike than ordinary siblings
C. less common than other types of multiple offspring
D. less likely with each additional birth

Correct answer: B

Rationale: The correct answer is B. Fraternal twins are no more alike than ordinary siblings because they share about 50% of their genes, just like other siblings. Choice A is incorrect as fraternal twins are not genetically identical. Choice C is incorrect as fraternal twins are actually the most common type of multiple offspring. Choice D is incorrect as the likelihood of fraternal twins is not affected by the number of births a mother has had.