Sensitive or responsive to stimulus.
- r. field that part of the retina of which the photoreceptors (rods and cones) pertain to a single optic nerve fiber. The response of a neuron to stimulation of its r. field depends on the type of neuron and the part of the field that is illuminated; an “on-center” neuron is stimulated by light falling at the center of its r. field and inhibited by light falling at the periphery; an “off-center” neuron reacts in exactly the opposite fashion; that is, it is inhibited by light falling at the center of its r. field. In either case, the net response depends on a complex switching action in the retina. When an entire r. field is equally illuminated, the response of receptors at the center of the field predominates.

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re·cep·tive ri-'sep-tiv adj
1) open and responsive to ideas, impressions, or suggestions
2 a) of a sensory end organ fit to receive and transmit stimuli
b) SENSORY (1)
re·cep·tive·ness n
re·cep·tiv·i·ty .rē-.sep-'tiv-ət-ē, ri- n, pl -ties

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re·cep·tive (re-cepґtiv) capable of receiving or of responding to a stimulus.

Medical dictionary. 2011.

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