Question

Gustatory receptors are
A. Rod cells of eyes
B. Taste buds of tongue
C. Epithelium of skin
D. Cone cells of eyes

Answer 1

Hint: Gustatory receptors present in the oral cavity. Gustatory receptor cells are found in the taste buds located on the tongue. It is a taste receptor which is used in the detection of taste.

Complete answer:
The tongue is a voluntary muscular structure present on the surface of the mouth. It is attached to the floor of the mouth by a fold which is known as frenulum. An inverted V-shaped furrow sulcus terminalis divides the upper surface of the tongue into anterior oral part and posterior pharyngeal part.
Gustatory receptors are present on the papillae of the tongue. These papillae are of different types:
> Filiform papillae: These are the smallest and most abundant papillae. They have no taste buds.
Fungiform papillae: They are red dots present on the tongue and contain taste buds.
> Foliate papillae: These papillae are absent in man.
> Circumvallate papillae: They are the knob-like structure and largest in size. They also contain taste buds.
Rod cells and cone cells are present in the eye which is used in the detection of light. Rods are used for the vision in dim light. The rods contain a purplish-red protein known as rhodopsin. Cone cells are used for vision in bright light. The Cones containing pigments for colour vision are erythrosin (red), chloropsis (green) and cyanopsin (blue).

So, the correct option is B.

Note: There are no taste buds for chillies. The burning sensation occurs after eating chillies is due to stimulation of pain receptors. The sweat glands of dogs are present on the tongue. It is also known as dog panting.