To lower the activation energy required to start a reaction
The stomach has three
layers of smooth muscle fibers run in three different angles. These layers are critical in giving the stomach the capability to mix, well, ingested
food as it is mixed with enzymes and hydrochloric acid. This is important
because smoothe muscles can only contract in one direction hence the layers
give multidirectional movements of the stomach hence goof mixing and better digestion.
How will what affect polar bears?