Pain signals from visceral receptors are “referred” to the body surface by a) convergence of visceral and somatic afferents onto the same tertiary neuron. b) convergence of visceral and somatic afferents onto the same secondary neuron. c) convergence of visceral and somatic afferents onto the same primary neuron. d) signals from visceral receptors that travel to skin receptors to activate them. e) divergence of visceral and somatic afferents onto different secondary neurons.

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