In the context of the five systems of rules involved in language, which of the following is the system that involves the way words are combined to form acceptable phrases and sentences?

Suicidal contagion refers to

A) copycat suicides. B) familial rates of suicide. C) empathy for the deceased. D) convincing another to join in a suicidal act.

In comparison to metabotropic receptors, ionotropic receptors produce effects that

A) are less diffuse. B) develop more rapidly. C) are more enduring. D) all of the above E) both A and B