Which organ is primarily responsible for filtering the blood to remove wastes and regulate water and electrolyte balance?

• A. Pancreas
• B. Spleen
• C. Kidneys
• D. Liver

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the function of each organ listed in the problem. The pancreas primarily produces digestive enzymes and hormones like insulin, the spleen filters blood and helps with immune response, the liver processes nutrients and detoxifies chemicals, and the kidneys filter blood to remove wastes and regulate water and electrolyte balance.
2. Step 2: Identify the organ that is directly involved in filtering blood to remove metabolic wastes such as urea and creatinine, which are byproducts of cellular metabolism.
3. Step 3: Recognize that this organ also plays a crucial role in maintaining homeostasis by regulating the volume and composition of body fluids, including water and electrolytes like sodium, potassium, and calcium.
4. Step 4: Recall that the kidneys perform these functions through structures called nephrons, which filter blood plasma, reabsorb needed substances, and secrete wastes into urine.
5. Step 5: Conclude that the kidneys are the primary organs responsible for filtering blood to remove wastes and regulate water and electrolyte balance.