Asking me to pay with a card and saying that every month it will cut, so how can I cancel it? anking montly subscription
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Type 4 RTA mechanism clarified: hyperkalemia decreases ammoniagenesis ADDED IN FA 2026 Type 4 RTA: hyperkalemia causes decreased ammoniagenesis in the proximal tubule, reducing NH3/NH4+ available for distal H+ buffering. This impairs net acid excretion despite intact distal H+ secretion (urine pH < 5.5). WHY IT MATTERS This fills the mechanistic gap for Type 4 RTA. Previously students memorized hyperkalemia + low urine pH without understanding why. Now the two-step logic is testable: hyperkalemia inhibits NH3 production, which reduces acid buffering capacity. eli5
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