Electromagnetic radiation:
a. does not really exist.
b. can be described as the movement of tiny indivisible particles called photons.
c. is made up of tiny particles called electromagnetons.
d. describes only the type of energy that is visible to the human eye.
Question 2
The medullary reticulospinal tract originates in the
a. reticular formation of the pons.
b. reticular formation of the medulla.
c. vestibular nuclei of the medulla.
d. midbrain.