Which statement concerning receptors is correct? A)They are present for every modality in the environment. B)When stimulated, they bring about opening of K⁺ channels in the efferent neuron membrane. C) Mechanical receptors are sensitive to varying amounts of heat. D) They may be either a specialized ending of an afferent neuron or a special cell closely associated with the peripheral ending of an afferent neuron.

Question

Quizplus · Accepted Answer

Receptors may be either a specialized ending of an afferent neuron or a special cell closely associated with the peripheral ending of an afferent neuron. Option A is incorrect because there are modalities that do not have dedicated receptors such as certain chemical substances. Option B is incorrect because there is no such thing as K⁺ channels. Option C is incorrect because mechanical receptors are not sensitive to varying amounts of heat, they are sensitive to mechanical stimuli such as pressure or touch.

Which Statement Concerning Receptors Is Correct