Kangas joined Nightly Business Report in 1979; in 2003, his Stocks in the News segment earned a Financial Writers and Editors Award from the Medill School of Journalism at Northwestern University. In 2005, he won a Suncoast Chapter Silver Circle Award.
What Is a Malpighian Tubule? Malpighian tubules are organs within insects that excrete solid waste. Larvae of certain species of beetles use Malpighian tubules to produce silk.
Relevance. Rating Newest Oldest. Best Answer: The proximal tubule regulates the pH of the filtrate by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate; furthermore, it is responsible for secreting organic acids, such as creatinine and other bases, into the filtrate.elevance. Rating Newest Oldest. Best Answer: The proximal tubule regulates the pH of the filtrate by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate; furthermore, it is responsible for secreting organic acids, such as creatinine and other bases, into the filtrate.