Question

Differentiate between primary and secondary receptor cells.

Answer 1

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A distinction is also made between primary and secondary receptors. In primary receptors, the substrate that reacts to an external influence is embedded in the sensory neuron itself, which is directly (primarily) excited by the stimulus. ... They are specialized to receive certain types of stimuli.

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Answer 2

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Answer:

A distinction is also made between primary and secondary receptors. ... In secondary receptors, additional specialized (receptive) cells are situated between the acting agent and the sensory neuron. The energy of external stimuli is transformed into nerve impulses in these cells.