Tag: mouth and buccal cavity

Questions Related to mouth and buccal cavity

A salivary gland is________________

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Brunners gland

  2. Sublingual gland

  3. Lacrimal gland

  4. Adrenal gland

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Correct Option: B
Explanation:
  • The sublingual gland is one of the three salivary glands present. They are located beneath the mucous membrane of the floor of the mouth. The other salivary glands are the parotid and the submandibular glands. 
  • Brunner's glands are present in the duodenum of the small intestine and helps in the release of mucous and proteolytic enzymes. Lacrimal glands are exocrine glands that supply tears to the corner of the eye. 
  • Adrenal glands are endocrine glands present above the kidneys that are involved in the production of a large number of different hormones. So, the correct answer is 'sublingual gland'.

In mammals, digestion of starch begins in

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Oesophagus

  2. Mouth

  3. Stomach

  4. Duodenum

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Correct Option: B

Wharton's duct is associated with 

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Brunner's gland

  2. Sublingual salivery gland

  3. Submaxillary salivary gland

  4. Parotid salivary gland

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Correct Option: C
Explanation:
A. Brunner's glands are found in the duodenum region of small intestine. Their secretions protect the walls of the intestine from the action of gastric juices.
B. Sublingual salivary glands are the smallest glands present beneath the tongue These open at the floor of buccal cavity through ducts of Rivinus.
C. Submaxillary salivary gland are also called submandibular glands. These are medium sized glands and the duct of these glands is called Wharton's duct that opens in the oral cavity near the lower central incisors.
D. Parotid salivary glands are the largest salivary glands of the body. The duct of these glands is called Stenson's duct.
So, the correct answer is 'Submaxillary salivary gland'.

Salivary amylase of saliva begins digestion of

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Carbohydrate

  2. Nucleic acid

  3. Fat

  4. Protein

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Correct Option: A

Enzymes of salivary glands, stomach and small intestine works at pH __, __ and ___ respectively.

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. 6.8, 2, 8

  2. 8,2, 6.8

  3. 2,8,6.8

  4. 6.8, 8,2

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Correct Option: A

pH of saliva is

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. 9.5

  2. 8.0

  3. 7.0

  4. 6.5

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Correct Option: D

Identify the correctly matched structure and its secretion

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Brunners glands Salivary amylase

  2. Intestinal mucosa Insulin

  3. Gall bladder Bile

  4. Salivary gland Lysozyme

  5. Goblet cells - HCl

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Correct Option: D

Which is not correct

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Human saliva is near neutral

  2. An adult secretes 1.0 1.5 l of saliva per day

  3. Saliva is secreted by six pairs of glands

  4. Ptyalin breaks down cooked starch into maltose

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Correct Option: C

Choose the wrong statement among the following

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Trypsinogen is activated by enterokinase

  2. Optimum pH for salivary amylase is 8.9

  3. Rennin helps in digestion of milk proteins

  4. Goblet cells secrete mucus

  5. Submucosal glands of intestine are also known as Brunners glands

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Correct Option: B

A lubricant mucin, in saliva, is made up of

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Polyunsaturated fats

  2. Actin and myosin

  3. Glycoproteins

  4. Phospholipids

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Correct Option: C
Explanation:
A. Polyunsaturated fats are the fats in which hydrocarbon chain has two or more double bonds.
B. Actin and myosin are the protein filaments which help in muscle contraction.
C. Proteins associated with carbohydrates i.e. sugars attached to them, are called glycoproteins.
D. Lipids that contain a phosphate group, are called phospholipids.
The lubricant mucin in saliva is a glycoprotein. 
So, the correct answer is 'Glycoproteins'.