In Biology aberrant refer to something that's diverging from the normal types.
For example : Cancer Cells
Cancer cells usually keep multiplying at uncontrollable pace which is diverge from the normal cells' pace which make it aberrant
The <u>sympathetic</u> division of the autonomic nervous system increases alertness. This division's primary process is to stimulate the body's fight-or-flight responses.
On the other hand, the <u>parasympathetic</u> division has a calming effect on the body. It is responsible for rest-and-digest activities.
