Which of the following is NOT a disorder related to water balance in the human body?

• A. Edema
• B. Dehydration
• C. Hyponatremia
• D. Diabetes mellitus

Answer: (D)

Verified step by step guidance

1. Step 1: Begin by understanding the concept of water balance in the human body. Water balance refers to the regulation of water intake and output to maintain homeostasis. Disorders related to water balance typically involve issues with hydration levels or electrolyte balance.
2. Step 2: Examine each option provided in the question. Edema is a condition where excess fluid accumulates in tissues, disrupting water balance. Dehydration occurs when the body loses more water than it takes in, also affecting water balance. Hyponatremia is a condition characterized by low sodium levels in the blood, often caused by excessive water intake, which directly impacts water balance.
3. Step 3: Analyze the fourth option, Diabetes mellitus. This is a metabolic disorder related to insulin production and glucose regulation, not directly tied to water balance. While diabetes can lead to dehydration as a secondary effect, it is not classified as a disorder of water balance itself.
4. Step 4: Compare the options and identify the one that does not fit the category of water balance disorders. Diabetes mellitus stands out as unrelated to the primary regulation of water and electrolytes in the body.
5. Step 5: Conclude that the correct answer is Diabetes mellitus, as it is not a disorder directly associated with water balance in the human body.