A patient whose employment requires frequent lifting has a history of chronic back pain. After the nurse has taught the patient about correct body mechanics, which patient statement indicates the teaching has been effective?

Correct Answer: B

Rationale: The correct answer is B because the patient recognizing the importance of strengthening and supporting their back aligns with the goal of preventing further back pain. Strengthening exercises can help improve muscle support and reduce the risk of injury during lifting tasks. Choice A is incorrect as lifting above the waist with a straight back may still put strain on the back. Choice C is incorrect as avoiding lifting altogether is not a practical solution for someone whose job involves frequent lifting. Choice D is incorrect as sleeping with hips and knees extended may not necessarily prevent back strain during lifting activities.

Correct Answer: C

Rationale: The correct answer is C because discontinuing the use of sustained-release opioids is not appropriate for a patient with metastatic bone cancer of the left femur. This patient likely experiences severe pain that requires opioids for adequate pain management. Monitoring serum calcium levels (A) is essential due to the risk of hypercalcemia. Teaching about the need for strict bed rest (B) helps prevent fractures and reduces pain. Supporting the left leg when repositioning the patient (D) helps maintain alignment and prevent further damage.

Correct Answer: D

Rationale: The correct answer is D. The presence of diffuse lesions and skin sloughing on the client's mucous membranes is the greatest immediate threat in toxic epidermal necrolysis (TEN). This condition results in severe skin detachment, leading to increased risk of infection, fluid loss, and electrolyte imbalances. Skin sloughing can also affect mucous membranes, increasing the risk of respiratory compromise, sepsis, and systemic infection. The other choices are not the greatest immediate threat in TEN. Bacterial cellulitis (choice A) is a potential complication but not the most immediate threat. Fluid and electrolyte imbalances (choice B) are significant but secondary to the skin sloughing. A cascading autoimmune response (choice C) can occur in TEN but is not the immediate threat compared to the risk of mucous membrane involvement and skin sloughing.

Correct Answer: C

Rationale: The correct answer is C: Pulling the client up in bed. This action involves the greatest risk of skin shearing because it creates friction and shear forces on the skin, especially when the client is moved against the surface of the bed. This can lead to skin breakdown and pressure ulcers. Rolling the client from supine to side-lying position (B) and helping the client ambulate after surgery (D) can cause shear forces but to a lesser extent compared to pulling the client up in bed. Inserting a peripheral intravenous catheter (A) does not involve significant shear forces on the skin.

Correct Answer: D

Rationale: The skin's role in homeostasis includes temperature control, making 'thermal regulation by skin blood flow dilation or constriction'. The hypothalamus signals skin vessels to vasoconstrict e.g., conserving heat in cold (temp up 1°C) or vasodilate e.g., shedding heat in warmth (temp down 2°C) per Baranoski and Ayello (2004). , 'synthesis of vitamin K,' is false; skin makes vitamin D via UV e.g., 10 minutes sun yields 1000 IU not K, which liver produces. , 'elimination of carbon dioxide,' is lungs' job e.g., 35-45 mmHg CO2 exhaled, not skin. , 'glucose regulation by Langerhans cells,' misattributes; pancreatic islets, not skin's Langerhans (immune cells), manage glucose e.g., insulin drops 100 mg/dL. Skin's sweat and blood flow e.g., dilating vessels in 90°F heat regulate temp, a nurse's focus in fever or hypothermia. Unlike lungs or pancreas, skin's thermal role is dynamic, immediate, and measurable, aligning with essentials in *Wound Care Essentials*, making the accurate function.