QUESTION TEXT: One way kidney stones can form is…
QUESTION TYPE: Paradox
FACTS: Kidney stones form when urine has too much calcium or oxalate. Yet increasing calcium intake actually decreases the likelihood of kidney stones forming again.
ANALYSIS:The problem is pretty specific: too much calcium in the kidneys. If the new calcium didn’t go to the kidneys, then that could explain the paradox.
- This shows that the same effect occurs in animals. But it doesn’t explain anything.
- The stimulus wasn’t talking about increasing dietary oxalate.
- “Sometimes” could mean as little as 0.0001% of people who have kidney stones have this problem. And it doesn’t explain how eating more calcium helps.
- CORRECT. This explains it. If we eat more calcium then kidneys actually have to deal with less calcium.
- This adds new information but doesn’t explain our problem.
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