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Perception and sensation
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Major features of tetrapod sensory structures are well developed in fish which also have lateral lines, and some have electroreceptors and possibly magnetoreceptors. Receptors may be categorized according to the type of stimulus to which they respond: photoreceptors, chemoreceptors, mechanoreceptors, temperature receptors and nociceptors. Adaptations to aquatic habitats are described for examples from each category. Each type of receptor has the capacity to transduce (transform) its specific sensory stimulus into receptor potentials which initiate or modulate activity in sensory neurons to the brain. Although each type of receptor responds to a specific stimulus type, this is not an attribute of the nerve impulses generated, recognition of stimulus type depending on the area of the brain receiving the neural input. However, variations in stimulus intensity are recognized as change in input impulse frequency.
Title: Perception and sensation
Description:
Major features of tetrapod sensory structures are well developed in fish which also have lateral lines, and some have electroreceptors and possibly magnetoreceptors.
Receptors may be categorized according to the type of stimulus to which they respond: photoreceptors, chemoreceptors, mechanoreceptors, temperature receptors and nociceptors.
Adaptations to aquatic habitats are described for examples from each category.
Each type of receptor has the capacity to transduce (transform) its specific sensory stimulus into receptor potentials which initiate or modulate activity in sensory neurons to the brain.
Although each type of receptor responds to a specific stimulus type, this is not an attribute of the nerve impulses generated, recognition of stimulus type depending on the area of the brain receiving the neural input.
However, variations in stimulus intensity are recognized as change in input impulse frequency.
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