ANSWER :
5) Phosphate is an urinary buffer which released via macula densa cells of juxtaglomerulus apparatus into urinary filtrate to maintain osmosis when Na+ levels would high.
10) The red blood cells (RBCs) can not pass through blood brain barrier because barrier prevents blood from passing to the brain.
Thank you Question 5 0/0.4 pts Phosphate is a urinary buffer. Where does it come from...