foundation of nursing questions

Correct Answer: B

Rationale: The correct answer is B (200 cells/mm3 of blood) because a patient with HIV is considered to have AIDS when their CD4+ T-lymphocyte cell count drops below 200 cells/mm3. This threshold signifies a significant decrease in the immune system's ability to fight off infections and indicates progression to AIDS. Choice A (75 cells/mm3 of blood) is incorrect because this level is extremely low and would indicate severe immunosuppression, likely leading to AIDS much earlier than anticipated. Choice C (325 cells/mm3 of blood) and D (450 cells/mm3 of blood) are also incorrect as these levels are within the normal range or slightly lower, which would not meet the criteria for a diagnosis of AIDS.

Correct Answer: B

Rationale: The correct answer is B: Basal metabolic rate (BMR). BMR refers to the minimum amount of energy required to maintain basic physiological functions at rest. It accounts for about 60-75% of total energy expenditure. It is essential for sustaining life-sustaining activities such as breathing, circulating blood, and maintaining body temperature. Incorrect Choices: A: Resting energy expenditure (REE) is the total amount of energy expended by the body while at rest, including BMR and additional energy for daily activities. C: Nutrient density refers to the amount of nutrients per calorie in a food item, not the energy needed at rest. D: Nutrients are essential substances in food required for growth, maintenance, and repair, but they do not specifically refer to the energy needed at rest.

Correct Answer: D

Rationale: The correct answer is D: Age 48. This recommendation aligns with the current guidelines from major health organizations, such as the American Cancer Society, which suggest that women at average risk should start regular mammograms at age 45 to 54. Screening before age 45 may lead to unnecessary procedures due to false positives. Beginning at age 48 allows for early detection without subjecting the daughters to unnecessary testing at a younger age. Choices A, B, and C are incorrect as they suggest starting mammography at younger ages than recommended, which can increase the likelihood of false positives and unnecessary interventions.

Correct Answer: B

Rationale: The correct answer is B because an incisional biopsy is typically performed to confirm a diagnosis by obtaining a sample of the tissue in question. This allows for further analysis through special studies to determine the best course of treatment. The other choices are incorrect because: A: The reason for performing an incisional biopsy is not primarily based on pain or accuracy comparisons with other testing methods. C: An incisional biopsy is not done to assess potential recovery from a mastectomy but rather to diagnose the nature of the mass. D: Age and general health status are not sole criteria for determining the need for an incisional biopsy.

Correct Answer: C

Rationale: The correct answer is C: Formula intolerance. When a patient develops diarrhea shortly after starting enteral feeding, formula intolerance is the most likely cause. This can occur due to the patient's inability to tolerate certain ingredients in the formula, leading to gastrointestinal upset. Antibiotics (choice A) and Clostridium difficile (choice B) typically take longer to cause diarrhea. Bacterial contamination (choice D) would usually result in more severe symptoms beyond just diarrhea. In this scenario, formula intolerance is the most logical explanation for the immediate onset of diarrhea after starting enteral feeding.