Cells use passive and active transport to move materials across cell membranes in order to maintain a constant internal environment. what is the process of maintaining a constant internal environment called? * 1 point

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

answercoenzymes;

answer n81.2

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.