If a human system fails to function properly, what is the most likely result?

Correct Answer: B

Rationale: The correct answer is B: a disturbance in homeostasis. When a human system fails to function properly, homeostasis, the body's ability to maintain internal stability, is disrupted. This can lead to various health issues as the body struggles to maintain balance. Choices A, C, and D do not directly address the concept of homeostasis or the consequences of system failure, making them incorrect. Choice A (a stable rate of metabolism) does not reflect the impact of system failure on homeostasis. Choice C (a change in the method of cellular respiration) is too specific and does not encompass the broader consequences of system failure. Choice D (a change in the function of DNA) is not directly related to the immediate effects of system failure on the body's internal stability.

Correct Answer: B

Rationale: Correct Answer: B Rationale: 1. Systemic scleroderma is a connective tissue disease characterized by skin tightening, affecting blood vessels and internal organs. 2. Skin tightening in systemic scleroderma can lead to contractures if not managed with exercises. 3. Nurse must expect skin changes and educate on the importance of range-of-motion and muscle-strengthening exercises. 4. Increased joint flexibility (Choice C) is not expected in systemic scleroderma due to skin and tissue tightening. 5. Excessive salivation (Choice A) and frequent nosebleeds (Choice D) are not typical manifestations of systemic scleroderma.

Correct Answer: B

Rationale: The correct answer is B because washing genitalia using an antimicrobial soap helps prevent the spread of infection in individuals with AIDS. Antimicrobial soaps can kill germs and reduce the risk of transmitting infections. This step is crucial for maintaining personal hygiene and preventing the transmission of pathogens. Rinsing dishes with cold water (Option A) is incorrect because hot and sudsy water is necessary to effectively clean dishes and eliminate germs. Avoiding hand washing (Option C) is incorrect as hand washing is essential for preventing the spread of infections. Using only paper towels to dry hands (Option D) is not as important as proper hand washing with soap and water.

Correct Answer: D

Rationale: The correct answer is D because benign tumors are noncancerous and do not spread to other cells, whereas malignant tumors are cancerous and can spread to other cells. Benign tumors grow slowly, do not invade nearby tissues, and do not metastasize. On the other hand, malignant tumors are cancerous, grow rapidly, invade nearby tissues, and have the potential to spread to other parts of the body through the bloodstream or lymphatic system. Choices A, B, and C are incorrect because they inaccurately describe the characteristics of benign and malignant tumors, mixing up the definitions and behaviors of these two types of tumors.

Correct Answer: B

Rationale: The correct answer is B: Infection. Iron deficiency anemia is primarily caused by inadequate iron intake, chronic blood loss (e.g., gastrointestinal bleeding), and malabsorption issues. Infections do not directly lead to iron deficiency anemia. Infections can lead to anemia of chronic disease due to inflammation affecting iron utilization, but they do not cause iron deficiency anemia. Therefore, choice B is the correct answer. Choices A, C, and D are incorrect as chronic blood loss, malabsorption, and decreased intake are well-established causes of iron deficiency anemia, respectively.