Final answer:
The non-extracranial cause for altered consciousness is g. Tumors, as extracranial causes are those outside the brain, while tumors often refer to intracranial abnormalities affecting brain function.
Step-by-step explanation:
The question pertains to the identification of a non-extracranial cause for altered consciousness among a list of potential causes. An extracranial cause means the source of the problem is outside the brain. The majority of options listed, such as shock, hypotension, hypoglycemia, intoxication, and hypothermia or hyperthermia, are all systemic conditions that can impact the level of consciousness without directly involving any brain abnormalities. Systemic infection can similarly affect consciousness through systemic effects. However, tumors typically refer to a mass of tissue, and when related to consciousness changes, they are usually considered an intracranial cause if they are affecting the brain function directly. Hence, g. Tumors is NOT an extracranial cause for altered consciousness.