Answer:
real subtances? look around you and you'll find out
Explanation:
According to science writer Clare Smith for SeattlePi, the cell membrane<span> is kept from</span>collapsing<span> by its phospholipid bilayer, maintenance of the correct temperature, a cytoskeleton and </span>cell<span> junctions. These are necessary because the </span>cell membrane<span> is one of the most crucial components of a </span>cell<span>. Hope it helped!</span>
<span>-The nervous system processes information from receptors that detect changes in the environment.
-The nervous system coordinates the systems of the body.
-The nervous system sends out appropriate responses to react to changes in the environment.
-The nervous system maintains homeostasis.</span>
