Which statement best describes the basis of sensory adaptation?
◦ The thalamic centers that receive a prolonged stimulus gradually come to ignore it.
◦ The nerve fiber synapsed with a sensory receptor gradually returns to its baseline level of firing despite continued neurotransmitter stimulation.
◦ The spinal cord interneurons that receive a prolonged stimulus gradually come to ignore it.
◦ A continuously stimulated sensory receptor triggers fewer action potentials, so stimuli sent to the brain decrease and awareness of the stimuli is diminished.