A function of white blood cells is to

Correct Answer: D

Rationale: The correct answer is D: protect the body against pathogens. White blood cells are a vital part of the immune system and play a key role in defending the body against infections and diseases caused by pathogens such as bacteria, viruses, and other harmful substances. They do this by identifying and destroying pathogens through various mechanisms like phagocytosis and producing antibodies. Choice A (transport oxygen to body cells) is incorrect because the function of transporting oxygen is primarily carried out by red blood cells. Choice B (produce hormones that regulate cell communication) is incorrect as white blood cells do not produce hormones for this purpose. Choice C (carry glucose to body cells) is incorrect because the transportation of glucose is mainly performed by the bloodstream and facilitated by insulin.

Correct Answer: B

Rationale: The correct answer is B, as rifampin can cause skin and/or urine discoloration, turning them reddish-orange. This is a common side effect known as rifampin-induced discoloration. Choice A is incorrect because blurry vision is an adverse effect of ethambutol, not rifampin. Choice C is incorrect as rifampin does not improve hearing. Choice D is incorrect as sunlight sensitivity is not associated with rifampin. Therefore, understanding the potential side effect of skin discoloration is crucial for patient education regarding the new prescription for rifampin.

Correct Answer: B

Rationale: The correct answer is B because it demonstrates therapeutic communication by clarifying and restating the client's concern, showing empathy and understanding. This approach helps the client feel supported and encourages open communication with their partner. Choice A is incorrect because healthcare providers are not required by law to disclose a patient's HIV status without their consent, as it violates patient confidentiality under HIPAA. Choices C and D are incorrect as they do not address the importance of open communication and may lead to potential harm by withholding vital information. Overall, response B is the most appropriate as it promotes trust, honesty, and understanding in the client-nurse relationship.

Correct Answer: A

Rationale: The correct answer is A: Crohn disease. Crohn disease is an autoimmune disorder that primarily affects the gastrointestinal tract, causing inflammation and damage to the digestive system. It is characterized by symptoms such as abdominal pain, diarrhea, and weight loss. The other choices (B, C, D) are incorrect because Guillain-Barré syndrome affects the peripheral nervous system, Addison disease affects the adrenal glands, and Sjögren syndrome affects the exocrine glands, not the gastrointestinal system. Crohn disease specifically targets the gastrointestinal system, making it the most appropriate choice among the options provided.

Correct Answer: D

Rationale: The correct answer is D: Petechiae and purpura. Thrombocytopenia is a condition characterized by low platelet count, leading to impaired blood clotting. Petechiae are small red or purple spots on the skin caused by bleeding into the skin from broken capillaries. Purpura refers to larger purple patches caused by bleeding under the skin. In thrombocytopenia, the lack of platelets results in the inability to form clots, leading to bleeding in small vessels. Choices A, B, and C are incorrect because infection, pruritus, and scarring are not typically associated with bleeding due to thrombocytopenia.