the folds over to form the or primitive spinal cord
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Human Growth and Development Exam Questions

1. During prenatal development, the ectoderm folds over to form the __________, or primitive spinal cord.

Correct answer: B

Rationale: The correct answer is B. During prenatal development, the ectoderm folds over to form the neural tube, which eventually develops into the brain and spinal cord. The neural tube is the precursor to the central nervous system, including the primitive spinal cord. Choices A, C, and D are incorrect because the mesoderm does not form the neural tube, the endoderm is not involved in the formation of the central nervous system, and neuron tract is not the structure that forms the primitive spinal cord.

2. Lanugo ________.

Correct answer: D

Rationale: Lanugo helps the vernix stick to the skin. Vernix is a waxy substance that covers the fetus's skin during pregnancy. Lanugo is a fine, downy hair that helps to anchor the vernix to the skin, providing protection and nourishment to the developing fetus. Choices A, B, and C are incorrect as they do not accurately describe the role of lanugo in prenatal development.

3. Which factor disrupts the brain's regulation of hunger and metabolism?

Correct answer: C

Rationale: Reduced sleep is the correct answer as it affects hormones that regulate hunger and metabolism, leading to increased appetite and weight gain. Self-regulation is not directly related to the brain's regulation of hunger and metabolism. Frequent eating out may impact food choices and portion sizes but is not specifically linked to disrupting the brain's regulation. Using screen media can affect sleep patterns but is not as directly related to the brain's regulation of hunger and metabolism as reduced sleep.

4. During the second month of pregnancy, __________.

Correct answer: C

Rationale: During the second month of pregnancy, the heart of the developing fetus begins to develop separate chambers, forming the structure necessary for a fully functioning heart. This is a significant milestone in the prenatal development process. Choices A, B, and D are incorrect because the appearance of the umbilical cord as a primitive body stalk typically occurs around week 5-6, touch sensitivity extending to most of the body is more characteristic of the end of the second trimester, and the heartbeat is usually detectable through a stethoscope around the 18th to 20th week of pregnancy, not during the second month.

5. Many theorists believe that behaviorism and social learning theory ________.

Correct answer: C

Rationale: Many theorists believe that behaviorism and social learning theory offer too narrow a view of important environmental influences. This is because they focus mainly on observable behaviors and external factors, neglecting the role of internal cognitive processes and individual differences in shaping development. Choices A, B, and D are incorrect because behaviorism and social learning theory do not specifically emphasize the plasticity of cognitive development, overestimate people's contributions to their own development, or overemphasize each individual's unique life history. Instead, they are criticized for providing a limited perspective by focusing predominantly on external stimuli and behaviors.

Similar Questions

Baby Gabriella claps her hands after her mother does. Gabriella is displaying __________.
Which of the following is a situational barrier to seeking early prenatal care?
The embryonic disk __________.
During the period of the embryo, the __________ becomes the __________.
Infants engage in __________ by actively seeking emotional information from a trusted person in an uncertain situation.

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