Mr. Illyich is a 58-year-old chronic alcoholic who is seen at the clinic with glossitis, cheilosis, dermatitis, and photophobia. What is a possible diagnosis?

What does “C” represent?

Label component “C” on the reflex arc.

What does “B” represent?

Label component “B” on the reflex arc.

Name the receptor for the stretch reflex.

Label component “D” on the reflex arc.

The neural pathway for a reflex is called ________.

The patellar or knee-jerk reflex involves ________.

The pupillary light reflex is an example of a(n) ________.