A(n) _____ is a drug that blocks the action of a neurotransmitter.

When you look directly at an object, the image of the object focuses on a spot where many receptor cells called cones are packed together. This spot, which also gives us our sharpest vision, is the _____

a) retina. b) ganglion. c) fovea. d) blind spot.

Psychotic symptoms are more common among patients who

A) live alone or are hospitalized. B) are diagnosed with schizophrenia later in life. C) take large quantities of medications. D) reside in nursing homes or are hospitalized.