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ratelena
1 month ago
15

Briefly describe how lateral inhibition increases apparent contrast at edges. In your response be sure to discuss the role of li

ght receptors, horizontal cells and bipolar cells
Biology
1 answer:
lana [2.4K]1 month ago
4 0
The retina forms the inner layer of the eye, characterized by a complex network of various types of cells arranged in multiple layers. The primary mechanism for processing in the retina is the lateral interactions between these cells, with lateral inhibition being the most prominent type. Photoreceptors are the cells that capture light and convert it into an electrical signal, comprising cones and rods. Horizontal cells facilitate the lateral spatial interactions between these photoreceptors. Bipolar cells gather information from both the photoreceptors and horizontal cells and convey it to the inner layers of the retina. The retina consists of five stratified layers, including the external plexiform layer, where the lateral inhibition first occurs through horizontal cells that connect with photoreceptors and bipolar cells. This connection allows for modulation of the response of photoreceptors, enabling enhanced contrast and clarity in perceived images, largely due to inhibitory neurotransmitters like GABA. The extent of lateral inhibition is adaptable to light levels, and the gap junctions between horizontal cells and photoreceptors adjust according to light conditions.
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