Nursing Elites

1. A nurse is reviewing laboratory results for a term newborn who is 24 hours old. Which of the following results require intervention by the nurse?

• A. WBC count 10,000/mm3
• B. Platelets 180,000/mm3
• C. Hemoglobin 20g/dL
• D. Glucose 20 mg/dL

Correct answer: D

Rationale: A glucose level of 20 mg/dL is critically low for a newborn and requires immediate intervention. Hypoglycemia in a newborn can lead to serious complications such as neurologic deficits. The normal range for glucose levels in a newborn is typically 40-60 mg/dL. Choices A, B, and C represent normal or acceptable values for a term newborn and do not require immediate intervention. A WBC count of 10,000/mm3, platelets of 180,000/mm3, and hemoglobin of 20g/dL are all within normal ranges for a term newborn and do not raise immediate concerns.

2. Is a low sperm count or lack of sperm the most common infertility problem in men?

• A. TRUE
• B. FALSE
• C. Rarely
• D. Never

Correct answer: A

Rationale: A low sperm count or lack of sperm is indeed one of the most common causes of infertility in men. Factors such as hormonal imbalances, genetic issues, reproductive anatomy problems, and lifestyle factors can also contribute to male infertility. Choice B is incorrect because a low sperm count is a prevalent issue among men facing infertility, making it a common problem. Choices C and D are incorrect as they do not accurately reflect the prevalence of low sperm count as a cause of infertility in men.

3. Which field of biology studies heredity?

• A. Etiology.
• B. Ecology.
• C. Genetics.
• D. Eugenics.

Correct answer: C

Rationale: Genetics is the branch of biology that focuses on the study of heredity and variation in organisms. Etiology (choice A) deals with the causes of diseases, not heredity. Ecology (choice B) is concerned with the relationships between organisms and their environment, not specifically heredity. Eugenics (choice D) is a controversial field that involves improving the genetic quality of the human population through selective breeding, which is different from the study of heredity itself.

4. Does the probability of having a child with Down’s syndrome increase with the age of the parents?

• A. TRUE
• B. FALSE
• C. Sometimes
• D. Never

Correct answer: A

Rationale: The correct answer is A: TRUE. Advanced parental age, particularly maternal age, is associated with an increased risk of Down's syndrome in offspring. As parents get older, the likelihood of having a child with Down's syndrome increases. Choices B, C, and D are incorrect because the risk of Down's syndrome is known to rise with parental age, especially maternal age, due to the increased likelihood of chromosomal abnormalities during egg formation.

5. How many chromosomes are typically found in human cells, organized into pairs?

• A. 50
• B. 46
• C. 48
• D. 44

Correct answer: B

Rationale: Human cells typically contain 46 chromosomes organized into 23 pairs. This is the correct number for a normal human cell. Choices A, C, and D are incorrect because they do not represent the typical chromosome count in human cells.

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