1. Look at a line that separates a dark color from a light color. Describing this experience.

2. Which part of your retina is responsible for processing the edge ultimately?

a. ganglion cells

b. bipolar cells

c. rods

d. amacrine cells

3. What type of stimulus do ganglion cells prefer?

a. bright centers with dark surrounds

b. dark centers with bright surrounds

c. horizontal bars

d. vertical bars

4. Rod ganglia combine the visual fields of multiple rods.

a. True

b. False

5. How did your ganglion cell code for the stimulus you looked at?

a. With longer or shorter action potentials

b. With bigger or smaller action potentials

c. With taller or shorter action potentials

d. With more or less action potentials

6. How did your retina process the edge?

a. concentric on/off cells

b. the lateral connection between rods and cones

c. lateral inhibition

d. all response choices are correct

7. How did the sideways connections between receptors accentuate edges?

a. The receptors inhibit the responses of their ganglion cells

b. The receptors inhibit their own responses

c. The receptors inhibit the responses of complex cells

d. The receptors inhibit the responses of neighboring receptors

8. How did your ganglion cells code for stimulus size of the object you looked at?

a. By having visual fields that don't code for shape

b. By having visual fields with stronger off switches

c. By having visual fields of varying sizes

d. By having complex cells

9. You process orientation of the stimulus in your retina.

a. True

b. False

10. Which stimulus specifies the existence of an edge?

a. a transition between shades of brightness

b. panels

c. stairs

d. a transition between colors