Tag: digestive system of human

Quizzes (24) Questions (225)

Questions Related to digestive system of human

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

Amount of saliva secreted daily in humans is

  1. 250 ml

  2. 500 ml

  3. 100 ml

  4. 1000 ml
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

There are three major parts of salivary glands that secrete saliva with the digestive enzyme such as parotid, submandibular and sublingual glands. Normally secretion of saliva is constant, regardless of the presence of food in the mouth. The amount of saliva secreted in 24 hours usually amounts from 1 liter to 1.5 litres. 

Therefore, the correct answer is option D.

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

A salivary gland is________________

  1. Brunners gland

  2. Sublingual gland

  3. Lacrimal gland

  4. Adrenal gland
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

Wharton's duct is associated with 

  1. Brunner's gland

  2. Sublingual salivery gland

  3. Submaxillary salivary gland

  4. Parotid salivary gland
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

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

  1. 6.8, 2, 8

  2. 8,2, 6.8

  3. 2,8,6.8

  4. 6.8, 8,2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salivary amylase works best at a slightly acidic pH of about 6.8, gastric enzymes (like pepsin) work in a highly acidic environment (pH 1-2), and intestinal enzymes work in an alkaline environment (pH 8).

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

Identify the correctly matched structure and its secretion

  1. Brunners glands Salivary amylase

  2. Intestinal mucosa Insulin

  3. Gall bladder Bile

  4. Salivary gland Lysozyme

  5. Goblet cells - HCl
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Salivary glands secrete saliva containing enzymes like salivary amylase and lysozyme, which provides antibacterial protection. Brunner's glands secrete alkaline mucus, not amylase.

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

Which is not correct

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

There are three pairs of salivary glands (parotid, submandibular, and sublingual), not six pairs. Therefore, the statement that there are six pairs is incorrect.