Chemicals in the Air Stimulate Signals the Brain Interprets as Smells.
The sense of smell is called olfaction. It starts with specialized nerve receptors located on hairlike cilia in the epithelium at the top of the nasal cavity. When we sniff or inhale through the nose, That triggers a signal that travels up a nerve fiber, neuron cell send the signal toward the olfactory area of the cerebral cortex.
Taste:
Home of the Taste Buds: The Tongue Is the Principal Organ of Gustation .
When we eat, chemicals from food These chemicals activating nervous receptors. The receptors send signals to fibers of the facial, glossopharyngeal, and vagus nerves. which relays them to the cerebral cortex of the brain.