Correct Answer: D

Rationale: Inhalation injury is the most common cause of injury from a house fire. When a fire occurs, the smoke produced contains harmful gases and particles that can be inhaled, leading to serious respiratory issues. This makes inhalation injury the primary concern during a house fire. Choices A, B, and C are less likely to be the primary cause of injury. While explosions may occur in some cases, inhalation of smoke and toxic fumes is generally the most prevalent danger. Falls from windows and thermal damage to the skin are also significant risks but typically occur after inhalation injuries in the sequence of events during a house fire.

Correct Answer: D

Rationale: The correct answer is 'sunburn from lack of protection and overexposure.' First-degree burns primarily affect the outer layer of the skin and are commonly caused by overexposure to the sun without adequate protection, making it a significant concern for parents of small children. Choices A, B, and C describe other types of burns (scalding, contact with hot surfaces, and contact with flammable substances) that can cause more severe burns beyond the first-degree level. It is crucial for parents to be educated about sun safety measures to prevent sunburns in children.

Correct Answer: B

Rationale: The correct answer is Caucasians. Studies have shown that Caucasians have the highest incidence of inflammatory bowel disease (IBD) compared to other cultural groups. While IBD can affect individuals from various backgrounds, the prevalence is notably higher in Caucasians. Asians, Hispanics, and African Americans have a lower incidence of IBD compared to Caucasians, making them incorrect choices in this context.

Correct Answer: A

Rationale: In an emergency situation to assess for airway obstruction, the nurse should prioritize assessing the client's ability to speak. If a client can speak, it indicates that the airway is patent and not completely obstructed, allowing air to pass through the vocal cords for speech production. Choices B, C, and D are not the primary assessments for determining airway obstruction. Assessing the ability to hear is not directly related to an airway obstruction. While oxygen saturation and adventitious breath sounds are important in respiratory assessments, they are not the initial indicators of an airway obstruction. Oxygen saturation reflects the amount of oxygen in the blood, and adventitious breath sounds refer to abnormal lung sounds that may indicate conditions like pneumonia or bronchitis, but they do not specifically confirm airway patency.

Correct Answer: A

Rationale: The correct answer is high HDL cholesterol. High HDL cholesterol levels are associated with a decreased risk of cardiovascular disease because HDL helps remove LDL cholesterol from the arteries, reducing plaque buildup. Low HDL cholesterol (choice B) is actually associated with an increased risk of cardiovascular disease. Low total cholesterol (choice C) or low triglycerides (choice D) are not indicators of a decreased risk of cardiovascular disease; in fact, extremely low total cholesterol levels may indicate other health issues.