What is the role of aquaporins in the kidney

They prevent bursting of the cells. Aquaporins regulate the water flux in the kidney, red blood cells, etc.

answer; 60-100; beats per minute

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.