Correct Answer: A

Rationale: The correct statement is that fat emulsions have a high energy-to-fluid-volume ratio. Fat emulsions are formulated in 10%, 20%, and 30% solutions and supply 1.1, 2, and 3 kilocalories, respectively, for each milliliter. In comparison, a milliliter of 5% dextrose only supplies 0.17 kilocalories. Choices B, C, and D are incorrect. Choice B is false because fat emulsions are essentially pH neutral and isotonic, not hypertonic. Choice C is incorrect because fat emulsions are not basic solutions; they are essentially pH neutral. Choice D is incorrect as fat emulsions are not alkaline; they are pH neutral, making them compatible with most medications.

Correct Answer: A

Rationale: Alkylating agents, such as nitrogen mustards, are effective chemotherapeutic agents because they cross-link DNA strands with covalent bonds between alkyl groups on the drug and guanine bases on DNA. This cross-linking interferes with DNA replication and transcription, leading to cell death. Choice B is incorrect because alkylating agents have numerous side effects, including alopecia, nausea, vomiting, and myelosuppression. Choice C is incorrect because while nitrogen mustards are used to treat multiple types of cancer like chronic lymphocytic leukemia, non-Hodgkin's lymphoma, and breast and ovarian cancer, their effectiveness is primarily due to DNA cross-linkage. Choice D is incorrect because alkylating agents are non-cell-cycle-specific agents, meaning they can act on cells in any phase of the cell cycle, not just on cells that are actively dividing.

Correct Answer: B

Rationale: The correct answer is asking, "Did someone grab you by your arms?"? This question is direct and addresses the possibility of abuse, which is crucial when dealing with suspected abuse cases. It is important to ask direct questions in a sensitive and non-accusatory manner to gather information. Choice A is too general and may not prompt a disclosure of abuse. Choice C assumes falling as the cause without addressing abuse directly. Choice D is vague and does not specifically inquire about potential abuse, making it less effective in identifying abuse cases compared to the correct choice.

Correct Answer: D

Rationale: When a health care worker is concerned about a new mother being overwhelmed by caring for her infant, the best course of action is to refer the mother to parenting classes. Prevention of child abuse is focused on educating parents on how to care for their child and handle the demands of infant care. By attending parenting classes, the mother can build self-confidence, self-esteem, and coping skills. Parenting classes help parents understand the developmental needs of their children and learn effective ways to manage their home environment. Additionally, these classes provide parents with increased social contacts and knowledge about community resources. Contacting child protective services (choice A) should not be the immediate action as there is no indication of abuse. Providing literature about child care (choice B) may not be as effective as hands-on parenting classes. Consulting a therapist (choice C) may be beneficial, but addressing parenting skills through classes is more appropriate in this scenario.

Correct Answer: C

Rationale: The correct answer is 'Was physically or psychologically abused.' Research indicates that many individuals who become batterers have a history of being abused themselves. This cycle of abuse can influence their behavior as adults. Choice A is incorrect because growing up in a loving home does not necessarily prevent someone from becoming a batterer. Choice B is incorrect as being an only child is not a determining factor in becoming a batterer. Choice D is incorrect because while admitting to anger issues is a positive step, it is not a common characteristic of individuals who become batterers.