Digestion and Dental Anatomy

Questions covering teeth structure and function, digestive enzymes (salivary amylase, pepsin, trypsin, lactase), and the digestive process from mechanical breakdown by teeth to chemical breakdown by enzymes.

20 Questions Published

Questions

Question 1 Multiple Choice (Single Answer)

The layer of cells that secretes enamel of tooth is

  1. dentoblast
  2. osteoblast
  3. ameloblasts
  4. odontoblast
Question 2 Multiple Choice (Single Answer)

The hardest part of a tooth is the

  1. dentine
  2. enamel
  3. pulp
  4. dental tubules
Question 3 Multiple Choice (Single Answer)

The incisor tooth is meant for

  1. biting and cutting
  2. chewing
  3. munching and chewing
  4. munching
Question 4 Multiple Choice (Single Answer)

A dental disease characterised by mottling of teeth is due to the presence of an ingredient in drinking water, namely

  1. fluorine
  2. mercury
  3. boron
  4. chlorine
Question 5 Multiple Choice (Single Answer)

Among mammals, an herbivore has

  1. more teeth than carnivore
  2. flatter teeth than carnivore
  3. teeth that are more pointed than carnivore
  4. fewer teeth than a carnivore
Question 6 Multiple Choice (Single Answer)

A digestive enzyme, salivary amylase, in the saliva begins digestion of

  1. protein
  2. nucleic acids
  3. fats
  4. carbohydrates
Question 7 Multiple Choice (Single Answer)

About how much saliva does a person produce each day?

  1. 100 ml
  2. 250 ml
  3. 500 ml
  4. 1500 ml
Question 8 Multiple Choice (Single Answer)

Which of the following enzymes act efficiently at pH two?

  1. trypsin
  2. pepsin
  3. ptyalin
  4. all of the above
Question 9 Multiple Choice (Single Answer)

Pepsin digests the

  1. proteins in stomach
  2. carbohydrates in duodenum
  3. proteins in duodenum
  4. fats in ileum
Question 10 Multiple Choice (Single Answer)

Saliva has the enzyme

  1. pepsin
  2. ptyalin
  3. trypsin
  4. rennin
Question 11 Multiple Choice (Single Answer)

Trypsin enzyme in mammals is formed from the

  1. trypsinogen by the action of enterokinase
  2. trypsinogen by the action of protein
  3. trypsinogen by the action of fat
  4. none of these
Question 12 Multiple Choice (Single Answer)

Inactive enzyme precursors, such as pepsinogen for pepsin, are called

  1. holoenzymes
  2. actinases
  3. zymogens
  4. mucopolysaccharides
Question 13 Multiple Choice (Single Answer)

Which category of compound is the most concentrated energy source?

  1. Lipid
  2. Carbohydrates
  3. Proteins
  4. Vitamins
Question 14 Multiple Choice (Single Answer)

Pepsinogen is secreted by

  1. gastric glands
  2. intestinal glands
  3. chief cells
  4. parietal cells
Question 15 Multiple Choice (Single Answer)

In the presence of lactase, lactose breaks down into molecules of

  1. glucose and galactose
  2. glucose and fructose
  3. galactose only
  4. glucose only
Question 16 Multiple Choice (Single Answer)

Curdling of milk in the stomach is due to the action of

  1. pepsin
  2. rennin
  3. HCl
  4. renin
Question 17 Multiple Choice (Single Answer)

Diastema is associated with

  1. presence of certain teeth
  2. absence of certain teeth
  3. absence of tongue
  4. presence of tongue
Question 18 Multiple Choice (Single Answer)

A bolus is

  1. a mass of crushed food moistened with saliva
  2. the semisolid material resulting from partial digestion in the stomach
  3. the milky emulsified fat absorbed from small intestine
  4. an indigestible material that helps in movement and absorption
Question 19 Multiple Choice (Single Answer)

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

  1. maltase is breaking down into maltose
  2. lipases are forming fatty acids
  3. amylase is breaking down starches to disaccharides
  4. disaccharides are forming glucose
Question 20 Multiple Choice (Single Answer)

A lubricant, mucin, in saliva is made up of

  1. polyunsaturated fats
  2. actin and myosin
  3. glycoproteins
  4. phospholipids