Correct Answer: A

Rationale: Stool pH testing is used to screen for carbohydrate malabsorption. A low pH indicates the presence of unabsorbed carbohydrates, which are fermented by bacteria, leading to acidic stool.

Correct Answer: A

Rationale: The correct answer is A: Trust. According to Erikson's psychosocial development theory, when infants receive consistent and loving care, they develop trust. This trust forms the basis of the first stage of psychosocial development, known as Trust vs. Mistrust. Trust is essential for healthy social and emotional development. Choice B, Love, is incorrect as it is more of an emotion than a developmental stage. Choice C, Independence, typically occurs later in development during Erikson's Autonomy vs. Shame and Doubt stage. Choice D, Responsibility, is also not the correct answer as it relates more to later stages of development where individuals develop a sense of duty and obligation.

Correct Answer: C

Rationale: Severe dehydration is the most common cause of acute renal failure in children, as it leads to prerenal azotemia, which can progress to renal failure if not corrected. Other causes like pyelonephritis and tubular destruction are less common and usually secondary to other conditions.

Correct Answer: C

Rationale: When a parent's infant is born with physical defects, understanding the psychological reactions is crucial. The reaction is often similar to the grief experienced when facing the death of a child. Parents need to grieve for the loss of the expected child and adapt to the needs of a child with physical defects. The grief process typically involves stages like shock, frustration, and anger, which can last for years. Denial during the shock phase is not maladaptive but can help parents cope initially. Additionally, parents are sensitive to the behavior of health professionals, whose interactions can significantly influence the parents' reactions to the infant. Therefore, recognizing the similarity of the psychological reaction to grief is an important consideration in understanding how parents cope with their infant's physical defects.

Correct Answer: C

Rationale: The correct answer is C because the PCA pump can be programmed to deliver a continuous basal rate of pain medication to maintain pain control. While the goal of PCA is effective pain relief, it does not guarantee a pain-free state. In the case of a 5-year-old child, the parents or nurse can administer boluses if necessary since the child may not fully comprehend using the PCA button. Monitoring every 1 to 2 hours for patient response is adequate and there is no need for monitoring every 15 minutes, as stated in choice D, unless specific circumstances dictate more frequent monitoring.