Which of the following is not considered a neurotransmitters?

The external ear ends at the

The most basic reflex arc is

Somatic motor neurons

Another name for tic douloureux is

Which of the following is not a characteristic of a general sense organ?

Another name for connecting neurons is

Which of the following is not a bone of the middle ear?

Parkinson disease is a nervous disorder resulting from a deficiency of which neurotransmitter?

Match each structure of the eye with its corresponding description or function.