A neuron in the visual cortex becomes excited whenever light of a particular shape (such as a line) falls on a particular part of the retina. That neuron is said to be a

A) visual constancy.
B) feature detector.
C) ganglion cell.
D) basilar membrane

The neuron described is a feature detector, as it responds to a specific feature (shape of a line) in a specific location (part of the retina). Visual constancy refers to the way the brain maintains the perception of size, shape, and color even as the eyes move or lighting conditions change. Ganglion cells are nerve cells in the retina of the eye that transmit information from the photoreceptors to the brain. The basilar membrane is a structure in the inner ear involved in hearing.