Tag: role of receptors in the mouth

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Multiple choice 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

Grinding and chewing teeth are called as

  1. Premolars

  2. Canines

  3. Incisors

  4. Molars
Reveal answer Fill a bubble to check yourself
D Correct answer
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".

Multiple choice 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

Layer of cells that secrete enamel of tooth is 

  1. Osteoblast

  2. Ameloblast

  3. Odontoblast

  4. Dentoblast
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

Multiple choice 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

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

  1. Incisors

  2. Molars

  3. Canines

  4. Premolars
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

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

  1. Hydrolase, maltase

  2. Amylase, maltose

  3. Amylose, kinase

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  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.
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Emulsification of facts is done by-

  1. Saliva

  2. bile

  3. gastric juices

  4. intestinal juices
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

Multiple choice 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

An adult has ............. teeth. 

  1. 20

  2. 24

  3. 28

  4. 32
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.