Absorption it regulates the pH of the filtrate by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate; it is also responsible for secreting organic acids, such as creatinine and other bases, into the filtrate.
I hope this helps
The substance is guided through a protein embedded in the membrane from high to low concentration since this not considered as active.
The answer is C because if you put coral reefs in more places more species of fish will come in hiding it
I believe it’s the lithosphere
