Where does ammonia play its most important role as a base buffer?

A 3-month-old is not breathing. When you arrive, a woman runs to you with the infant in her arms. He is limp, gray in color, and not breathing. You cannot find a brachial pulse. You should first:

A) find out if the woman is the child's mother. B) begin CPR. C) ask when was the last time anyone saw the infant alive. D) look for any signs of child abuse.

Which of the following mechanisms causes indirect brain injury?

A) Coup/contrecoup injuries B) Systemic hypotension combined with increasing intracranial pressure C) Cushing's reflex D) Acceleration/deceleration forces without a direct blow to the cranium