Function of Kidneys
Eight medium-difficulty multiple-choice questions exploring key roles, regulation, and consequences of kidney function.
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Quiz Questions & Answers
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Question 1: Which primary function of the kidney directly maintains blood osmolarity and electrolyte balance?
Storage of excess glucose as glycogen
Regulation of water and solute reabsorption in nephrons
Secretion of digestive enzymes
Synthesis of plasma proteins
Question 2: How do kidneys contribute to long-term blood pressure control?
By storing lipids that buffer blood pressure spikes
By producing insulin to lower vascular tone
By adjusting sodium and water excretion and activating the renin-angiotensin-aldosterone system
By increasing heart rate during dehydration
Question 3: Which scenario best illustrates the kidney's role in acid-base balance?
Excreting hydrogen ions and reabsorbing bicarbonate to correct metabolic acidosis
Converting amino acids into glucose during fasting
Storing lactic acid in the bladder until pH normalizes
Increasing ventilation to remove carbon dioxide
Question 4: Which hormone is produced by the kidney to stimulate red blood cell production?
Thyroxine
Aldosterone
Insulin
Erythropoietin
Question 5: What immediate consequence follows a sudden drop in glomerular filtration rate (GFR)?
Enhanced secretion of digestive acids
Rapid bone demineralization within minutes
Immediate increase in urine sodium excretion
Decreased urine output and potential accumulation of waste products
Question 6: Which statement corrects the myth that kidneys only filter blood and have no metabolic roles?
Kidneys also synthesize hormones, activate vitamin D, and perform gluconeogenesis
Kidneys work only during sleep to rest the body
Their sole metabolic role is digesting lipids
They only filter blood but store excess amino acids
Question 7: In a patient with reduced kidney function, which medication management principle is most important?
Adjust drug dosing and avoid nephrotoxic agents based on kidney function
Only use topical medications to avoid renal effects
Stop all medications immediately regardless of indication
Double doses to overcome reduced clearance
Question 8: Which mechanism explains why high dietary sodium tends to raise blood pressure via the kidneys?
Sodium directly constricts alveoli reducing oxygenation
Dietary sodium is converted to sugar, increasing osmolarity
Increased sodium retention expands extracellular fluid volume, raising blood pressure
Salt is stored in bones and alters heart rhythm