Which is the cell structure that is made of dna that gives the master instructions for the cell?

answer; synapse;

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.

i believe this is true, if you're asking for whether its true or false. : )