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Multiple Choice
Which of the following processes would most likely occur in the kidney?
A
Secretion of digestive enzymes
B
Production of bile
C
Filtration of blood to form urine
D
Absorption of nutrients
Verified step by step guidance
1
Understand the primary function of the kidney: The kidney is responsible for filtering blood to remove waste products, excess substances, and toxins, forming urine as a result. It does not perform functions related to digestion or nutrient absorption.
Eliminate incorrect options: Secretion of digestive enzymes is a function of organs like the pancreas and salivary glands, not the kidney. Production of bile is a function of the liver, not the kidney. Absorption of nutrients primarily occurs in the small intestine, not the kidney.
Focus on the correct process: Filtration of blood to form urine is the key function of the kidney. This process occurs in microscopic structures called nephrons, which consist of the glomerulus and tubules.
Break down the filtration process: Blood enters the kidney through the renal artery and flows into the glomerulus, where filtration occurs. Waste products, water, and small molecules pass through the glomerular membrane into the Bowman's capsule, forming the initial filtrate.
Highlight the importance of filtration: Filtration is essential for maintaining homeostasis by regulating fluid balance, electrolyte levels, and removing metabolic waste products like urea and creatinine from the bloodstream.