Correct Answer: B

Rationale: The Apgar scoring system, developed by Virginia Apgar, an anesthesiologist, evaluates newborns based on five criteria: heart rate, respiratory effort, color, muscle tone, and reflex irritability. These parameters provide a quick and simple assessment of a newborn's overall condition and the need for immediate medical attention. Choices B, C, and D are incorrect as they do not encompass the essential elements evaluated by the Apgar scoring system.

Correct Answer: A

Rationale: The correct answer is to release physical restraints every 2 hours. Releasing restraints every 2 hours helps prevent complications associated with prolonged immobilization. Releasing restraints every 30 minutes (choice C) may be too frequent and disruptive to the client's care. Releasing restraints between 1 and 3 hours (choice B) introduces variability that could lead to inconsistencies in care. Releasing restraints at least every 4 hours (choice D) does not adhere to the recommended frequency of every 2 hours.

Correct Answer: A

Rationale: Padding on a restraint helps distribute pressure to prevent bony prominences from bearing excessive pressure when a client pulls against the restraints. This is crucial to avoid tissue damage caused by ischemia. The correct answer focuses on the physiological benefit of padding in reducing pressure on vulnerable areas to prevent harm. Choice B is incorrect as the primary purpose of padding is not emotional comfort but preventing physical harm. Choice C is incorrect as while padding can indirectly help prevent infection and wounds by reducing pressure, its primary function is pressure distribution. Choice D is incorrect as the main purpose of padding is not to keep the restraints in place but to protect the client's skin and tissues from pressure-related injuries.

Correct Answer: A

Rationale: The correct answer is circadian rhythm. Circadian rhythm refers to the rhythmic repetition of patterns that occur approximately every 24 hours, regulating various biological processes related to the day-night cycle. Infradian rhythm, which is longer than 24 hours, and ultradian rhythm, which is shorter than 24 hours, are not the correct terms for the 24-hour cycle. Non-REM rhythm does not specifically relate to the 24-hour day-night cycle, making it an incorrect choice.

Correct Answer: C

Rationale: The correct answer is 4.0 mEq/L. Normal serum potassium levels typically range from 3.5-5.5 mEq/L. Choice A (1.5 mEq/L) is below the normal range, Choice B (3.0 mEq/L) is also below the normal range, and Choice D (6.0 mEq/L) is above the normal range. Therefore, the only option within the normal range is Choice C (4.0 mEq/L).