In the human body, gustatory receptors are primarily located on the:

The correct option is Tongue.

Explanation

Sensory receptors are specialized structures in the nervous system that respond to specific changes in the environment. Gustatory receptors are chemoreceptors specifically responsible for the sense of taste.

• Tongue is Correct: Gustatory receptors are primarily located within the taste buds on the surface of the tongue. These receptors detect chemical molecules dissolved in saliva and transmit sensory information to the brain through the facial, glossopharyngeal, and vagus nerves.
• Inner ear is Incorrect: The inner ear contains receptors for hearing (auditory receptors in the cochlea) and balance (vestibular receptors), not taste.
• Retina is Incorrect: The retina contains photoreceptors (rods and cones) which are responsible for vision.
• Skin is Incorrect: The skin contains cutaneous receptors such as mechanoreceptors (touch), thermoreceptors (temperature), and nociceptors (pain).

Key Takeaway: Gustatory receptors are associated with the sense of taste (tongue), while olfactory receptors are associated with the sense of smell (nose).