Asensory neuron that detects hot temperatures has free, naked dendrites without any surrounding complex structures. another neuron nearby also has free, naked dendrites without any surrounding complex structures, but it responds only to cold temperatures. what likely confers the specificity of these neurons to hot or cold?

a)the kind of gated channels on their plasma membranes.
b)the diameter of their dendrites.
c)the hot receptor sends signals to s1 (sensory cortex) via the spinothalamic pathway, while the cold receptor sends signals via the dorsal column-medial lemniscal.
d)different ion composition around each receptor.
e)the location on the skin.