The peripheral nervous system has how many divisions?

What is the function of the pinna?

To which of these structures does the external auditory meatus extend up to?

Which of these is the sensory part of the otolith?

Which of these structures are present around the auditory meatus?

The neural system of lower invertebrates is better than the insects.

Which of these functions is not controlled by the medulla oblongata?

At resting membrane potential, the axonal membrane is permeable to which ions?