A Complex Web of Connections Goes from the Photoreceptors to the Retinal

question 30

Essay

A complex web of connections goes from the photoreceptors to the retinal ganglion cells (in- cluding amacrine cells,horizontal cells,and bipolar cells).What is gained by the visual system from all this processing,rather than simply propagating (or passing forward)the basic signal initially transmitted from each photoreceptor?

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Definitions:

Foraging

The act of searching for and exploiting food resources by animals, including hunting, fishing, and gathering plant materials.

Pastoralism

The breeding and managing of migratory herds of domesticated grazing animals, such as goats, sheep, cattle, llamas, and camels.

Subsistence

The action or fact of maintaining or supporting oneself, especially at a minimal level.

Ju/'hoansi

A group of indigenous people living in the Kalahari Desert of southern Africa, known for their hunter-gatherer lifestyle.