which statement about a blastocyst is true
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Human Growth and Development Exam Questions

1. Which statement about a blastocyst is true?

Correct answer: C

Rationale: The statement that is true about a blastocyst is that between the seventh and ninth days, it burrows deep into the uterine lining. This process, known as implantation, is essential for the blastocyst to establish a connection with the mother's body and receive nutrients for further development. It is a critical stage in prenatal development and sets the foundation for pregnancy. Choices A, B, and D are incorrect. A blastocyst is not a single cell but rather a structure composed of many cells. It is not a structure that feeds the developing organism; instead, it implants in the uterine lining to receive nutrients. It is not a membrane that regulates temperature but plays a crucial role in the initial stages of pregnancy by implanting in the uterus.

2. Mothers who __________ have fewer birth complications and shorter labors.

Correct answer: C

Rationale: According to research, mothers who are supported by a trained companion during childbirth have fewer birth complications and shorter labors. This support can reduce stress and anxiety levels, provide comfort and encouragement, and help the mother feel more in control during labor and delivery. Overall, having a trained companion present can contribute to a more positive childbirth experience for the mother. Choices A, B, and D are incorrect because they do not align with the research findings that specifically highlight the benefits of having a trained companion during childbirth.

3. Which statement about the newborn baby's appearance is true?

Correct answer: C

Rationale: The correct statement about the newborn baby's appearance is that the trunk is large in comparison to the head, and the legs are straight. This is a common characteristic of newborn babies as their proportions are different from adults. Choice A is incorrect as there is no consistent trend of girls being longer and heavier than boys at birth. Choice B is incorrect as the perception of adults wanting to pick up babies is subjective and not a universal truth. Choice D is incorrect as the average length and weight provided may not apply to all newborn babies, as there can be variations.

4. The discontinuous view of development holds that __________.

Correct answer: C

Rationale: The discontinuous view of development holds that infants and children have unique ways of thinking, feeling, and behaving. This perspective suggests that development is not a continuous or smooth process, but rather occurs in distinct stages or phases marked by qualitative differences in abilities and behaviors. This contrasts with the idea that development is a gradual augmentation of skills present from the beginning (choice B) or that infants and preschoolers respond to the world in the same way as adults (choice A). Choice D is incorrect because the discontinuous view does not consider development as a smooth process limited by a lack of information and precision. Ultimately, the discontinuous view emphasizes the distinct and evolving nature of development across the lifespan.

5. In a correlational design, researchers __________.

Correct answer: A

Rationale: In a correlational design, researchers gather information on individuals without altering their experiences. Correlational studies examine the relationship between two or more variables without any manipulation or control by the researchers. The researchers simply observe and measure the variables of interest without intervening in any way. Choices B, C, and D are incorrect because they describe aspects related to experimental designs rather than correlational designs. In an experimental design, researchers manipulate variables, assign participants to different treatment conditions, and control changes in the independent variable, which is not the case in correlational studies.

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