Question

Identify the mismatched pair in the following:-
A)alimentary canal-sphincter muscle
B)Esophagus-peristatic movement
C)tongue - olfactory receptors
D)lungs - thoracic cavity

Answer 1

Mismatched pair in the given options is - C)tongue - olfactory receptors

•Tongue contains taste buds, which are made of receptor cells. Their main function is tasting, as indicated by name.

•These receptor cells are also called gustatory cells. Taste receptors are commonly found on upper layer of tongue.

•There are five types of taste receptors, located at different positions on tongue.

•The five tastes which can be recognized are - sweetness, sourness, saltiness, bitterness, and umami.

•Olfactory receptors are responsible for smell. They are found in nasal cavity.

•Human beings are enriched with 400 types of scent receptors and we smell approximately 1 trillion different odours.

Answer 2

Tongue - peristaltic movement the mismatched pair.

Option: C

Explanation:  

• The alimentary canal consists of the sphincter muscle. They prevents backflow of food in elementary Canal.  

• The oesophagus helps in the movement of the food by process known as peristalsis.  

• In this movement there is contraction and relaxation of the abdominal muscle which helps in movement of the food forward in the alimentary canal.  

• The lungs are present in the thoracic cavity. That tongue does not consist of the olfactory receptors.  

• The olfactory receptors are present in the nose which helps in sensing smell.

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