Nursing Elites

1. Shamona, a pregnant mother in Flint, Michigan, is concerned about the drinking water, which shows high levels of lead. Shamona should know that high levels of prenatal lead exposure are related to __________.

• A. facial abnormalities and heart defects
• B. defects of the genitals and urinary tract
• C. low birth weight and brain damage
• D. a variety of childhood cancers

Correct answer: C

Rationale: High levels of prenatal lead exposure are related to low birth weight and brain damage. Lead exposure during pregnancy can have harmful effects on the developing fetus, leading to complications such as decreased birth weight and potential long-term brain damage. Choices A, B, and D are incorrect because they do not directly correlate with the known effects of prenatal lead exposure. While lead exposure can indeed cause a variety of health issues, such as heart defects and urinary tract problems, the primary concerns related to prenatal exposure are low birth weight and brain damage.

2. Which statement about prenatal marijuana exposure is true?

• A. It is linked to impulsivity and overactivity.
• B. Lasting consequences are well-established.
• C. Studies show no negative effects of exposure.
• D. It is linked to an array of physical malformations.

Correct answer: A

Rationale: The correct answer is A: 'It is linked to impulsivity and overactivity.' Prenatal marijuana exposure has been associated with impulsivity and overactivity in children based on research findings. However, lasting consequences of prenatal marijuana exposure are not as well-established compared to other teratogens. Choice B is incorrect because lasting consequences are not firmly established. Choice C is incorrect because studies have shown negative effects of prenatal marijuana exposure. Choice D is incorrect as prenatal marijuana exposure is not primarily linked to physical malformations.

3. In the __________ period, teratogens rarely have any impact.

• A. germinal
• B. embryonic
• C. fetal
• D. prenatal

Correct answer: A

Rationale: In the germinal period of prenatal development, which lasts for about the first two weeks after fertilization, the developing organism is a zygote that has not yet implanted in the uterus. During this period, teratogens rarely have any impact because essential implantation and early cellular division processes are occurring. Teratogens are more likely to have significant effects during the later embryonic and fetal periods of development. Therefore, the correct answer is A. Choice B, embryonic period, is incorrect because teratogens have a higher likelihood of impacting development during this period. Choice C, fetal period, is also incorrect as teratogens can impact development during this stage as well. Choice D, prenatal, is a broad term encompassing the entire period of development from conception to birth and is not a specific developmental stage where teratogens have a minimal impact.

4. Newborn Mariana, who reacts strongly to unpleasant stimuli, is __________.

• A. probably easy to console
• B. susceptible to colic
• C. likely to spend less time in REM sleep
• D. unlikely to respond to swaddling

Correct answer: B

Rationale: Newborn Mariana, who reacts strongly to unpleasant stimuli, is described as susceptible to colic. Colic is often characterized by excessive crying and fussiness in newborn babies, which can be challenging to console. This description suggests that Mariana's strong reactions to unpleasant stimuli may make her more prone to colic. Choices A, C, and D are incorrect because the strong reactions to unpleasant stimuli do not imply being easy to console, affect REM sleep, or responsiveness to swaddling.

5. In females, the twenty-third pair of chromosomes is labeled as __________.

• A. an autosome
• B. dizygotic
• C. XX
• D. XY

Correct answer: C

Rationale: In females, the twenty-third pair of chromosomes is indeed labeled as XX. This pair of chromosomes determines the biological sex of females. Choice A, 'an autosome,' is incorrect as autosomes refer to the non-sex chromosomes. Choice B, 'dizygotic,' is incorrect as it relates to twins. Choice D, 'XY,' is incorrect as it represents the chromosome pair found in males.

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