Question

Which of the following is not true of the cranial nerves? multiple choice

O there are 12 pairs of cranial nerves.
O they are part of the cns.
O most arise from the brainstem.
O most, but not all, are mixed nerves.
O all of these are true of the cranial nerves.

Answer 1

Cranial nerves are part of the peripheral nervous system (PNS), not the central nervous system (CNS), which is the only option among the listed statements that is not true.

Step-by-step explanation:

The statement that cranial nerves are part of the central nervous system (CNS) is not true. There are indeed 12 pairs of cranial nerves, and most arise from the brainstem. Additionally, most cranial nerves are indeed mixed nerves, meaning they have both sensory and motor functions.

However, cranial nerves are considered to be part of the peripheral nervous system (PNS) rather than the CNS. The CNS consists solely of the brain and spinal cord, whereas cranial nerves, like spinal nerves, are part of the PNS as they serve as the line of communication between the CNS and the rest of the body.