The best explanation(s) for the microvilli on the apical surface of the proximal convoluted tubule (PCT) is because their movements propel the filtrate through the tubules and they increase the surface area and allow for a greater volume of filtrate components to be reabsorbed. True False

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.

during expiration the diaphragm relaxes, which causes the diaphragm to move downwards. the contraction of diaphragm increases the space for expansion of lungs. hence, the diaphragm relaxes and positioned downward during expiration.