Tag: role of receptors in the mouth

Questions Related to role of receptors in the mouth

Grinding and chewing teeth are called as

evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Premolars

  2. Canines

  3. Incisors

  4. Molars

Show answer
Correct Option: D
Explanation:

Adult human teeth have 12 molars. They are biggest and strongest teeth. The large surface are o molars helps in grinding and chewing the food. They break up the food into pieces small enough for making it easy to swallow.

So, the correct answer is "Molars".

Layer of cells that secrete enamel of tooth is 

evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Osteoblast

  2. Ameloblast

  3. Odontoblast

  4. Dentoblast

Show answer
Correct Option: B
Explanation:

Osteoblast-bone forming cell. Ameloblast-enamel elaborating cell. Odontoblast- dentine elaborating cell. Dentoblast- tooth cell.

The teeth placed at the end of the buccal cavity and help in chewing food are which of the following?

evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Incisors

  2. Molars

  3. Canines

  4. Premolars

Show answer
Correct Option: B
Explanation:
The most posterior teeth in the mouth are the molars. They have broader and flatter surfaces with 4-5 cusps. They help in chewing and grinding the food.
So the correct answer is 'Molars'.

Saliva contains .......... enzyme which hydrolyses starch into 

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Hydrolase, maltase

  2. Amylase, maltose

  3. Amylose, kinase

  4. None of the above

Show answer
Correct Option: B
Explanation:

The digestion of food begins at the mouth where the saliva is secreted by the salivary gland that contains an enzyme called as salivary amylase enzyme which hydrolyzes starch into maltose but the complete digestion of starch occurs only in the small intestine by the action of pancreatic amylase. 

Ptyalin is an enzyme present in

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Gastric juice

  2. Pancreatic juice

  3. Intestinal juice

  4. Saliva

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Correct Option: D

Starch is changed to maltose by

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Diastase/amylase

  2. Invertase

  3. Lipase

  4. Zymase

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Correct Option: A

Substrate for amylase enzyme is

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Nucleic acid

  2. Protein

  3. Starch

  4. Fat

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Correct Option: C

If you chew on a piece of bread long enough, it will begin to taste sweet because

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. maltase is breaking down maltose

  2. lipases are forming fatty acids

  3. amylase is breaking down starches to disaccharides

  4. disaccharides are forming glucose.

Show answer
Correct Option: C
Explanation:

When you chew a piece of bread long enough, it will begin to taste sweet because amylase breaks down the starch to disaccharides.  

So the correct option is C.

Emulsification of facts is done by-

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Saliva

  2. bile

  3. gastric juices

  4. intestinal juices

Show answer
Correct Option: A
Explanation:

Chemical digestion takes place as lingual lipase, an enzyme in your saliva, begins to emulsify fat and saliva moistens the food to make it easier to swallow. When the food reaches your stomach, the muscles there begin to churn and move to further break it down. So the correct option is 'Saliva'.

An adult has ............. teeth. 

biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. 20

  2. 24

  3. 28

  4. 32

Show answer
Correct Option: D
Explanation:

A normal adult mouth has 32 teeth. 

  •  Incisors: The middlemost four teeth on the upper and lower jaws.
  • Canines: The pointed teeth just outside the incisors. 
  • Premolars: Teeth between the canines and molars.
  • The molars or molar: teeth are large, flat teeth at the back of the mouth. Hence, an adult has 32 teeth.
So, the correct answer is '32'.