Correct Answer: C

Rationale: The correct answer is C: 0.45% saline. This solution is hypotonic because it has a lower osmolarity compared to the intracellular fluid. It contains fewer solutes than the cells, causing water to move into the cells by osmosis, potentially causing them to swell. Normal saline (A) and Ringer's lactate (B) are isotonic solutions, meaning they have a similar osmolarity to the intracellular fluid and do not cause significant water shifts. 5% dextrose in normal saline (D) is a hypertonic solution, containing more solutes than the cells, leading to water movement out of the cells.

Correct Answer: C

Rationale: The correct answer is C because thiotepa is a cell cycle-nonspecific alkylating agent that interferes with both DNA replication and RNA transcription. Thiotepa works by cross-linking DNA strands, leading to inhibition of DNA replication and transcription, ultimately causing cell death. This mechanism of action makes it effective against actively dividing cells, such as cancer cells. Choice A is incorrect because thiotepa does not interfere with DNA replication alone. Choice B is incorrect because thiotepa affects both DNA replication and RNA transcription, not just RNA transcription. Choice D is incorrect because thiotepa does not destroy the cell membrane; instead, it acts on the genetic material within the cell.

Correct Answer: B

Rationale: The correct answer is B: a semi-private room. For a burn patient like Mr. Boy, a semi-private room is preferred to provide a more controlled environment for infection prevention, wound care, and privacy. Strict isolation (A) is not necessary as his burns are not infectious. Liberal visiting (C) can increase the risk of infection and compromise his recovery. Sharing equipment (D) can lead to cross-contamination and is not recommended for burn patients. In summary, a semi-private room balances infection control and patient comfort for burn patients.

Correct Answer: A

Rationale: The correct answer is A: Where is the pain located? In the PQRST mnemonic, "P" stands for provocation, "Q" for quality, "R" for region/radiation, "S" for severity, and "T" for timing. The question "Where is the pain located?" corresponds to the "R" component, which is region/radiation. This question helps the nurse identify the specific area where the pain is localized, which can provide valuable information for diagnosis. Explanation of other choices: B: What causes the pain? This question relates more to the "P" component, which is provocation, rather than the region/radiation aspect. C: Does it come and go? This question pertains to the "T" component, which is timing, focusing on the pattern of the pain rather than the specific location. D: What does the pain feel like? This question is more aligned with the "Q" component, which is quality,

Correct Answer: C

Rationale: The correct answer is C: Efferent neurons transmit impulses from the central nervous system to muscles and glands. This is because efferent neurons are responsible for carrying motor signals away from the central nervous system to control muscle movement and gland secretion. Afferent neurons (choice A) transmit sensory information from the body to the central nervous system. Affective (choice B) is not a term used in neuroscience for describing neuron functions. Effective (choice D) is not a term used in neuroscience and does not describe the specific function of transmitting impulses from the central nervous system to muscles and glands.