Tag: digestive system - organs

Questions Related to digestive system - organs

Brunners glands occur in

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Submucosa of duodenum

  2. Submucosa of stomach

  3. Mucosa of oesophagus

  4. Mucosa of ileum

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Correct Option: A

Which is false

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Oesophagus secretes digestive enzyme

  2. Gall bladder is absent in Horse

  3. Human teeth are thecodont

  4. There are three pairs of salivary glands in humans

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Correct Option: A

Semidigested food that moves down oesophagus is known as

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Bolus

  2. Chyme

  3. Rugae

  4. Protein

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Correct Option: A


Which of the following correctly describes the oesophagus?

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Food moves through the oesophagus under voluntary control

  2. Food enters the oesophagus from the pyloric region of the stomach

  3. It allows the passage of chyme

  4. It is a collapsible muscular tube extending from pharynx to stomach

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Correct Option: D
Explanation:
  • The oesophagus is a long, muscular tube that connects your mouth to your stomach. It's around 25cm (10 in) long in adults. 
  • When you swallow food, the walls of the oesophagus squeeze together (contract).
  •  This moves the food down the oesophagus to the stomach. Hence, the oesophagus is a collapsible muscular tube extending from pharynx to stomach.
So, the correct answer is ' collapsible muscular tube extending from pharynx to stomach'. 


The acidic region of gastrointestinal tract is

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. mouth

  2. large intestine

  3. small intestine

  4. stomach

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Correct Option: D
Explanation:

  • Parietal cells in the stomach secrete roughly two litres of acid a day in the form of hydrochloric acid. 
  • The acid in the stomach functions to kill bacteria, and to help digestion by solubilizing food. 
  • The acid is also important to maintain the optimal pH (between 1.8-3.5) for the function of the digestive enzyme pepsin. Hence, the acidic region of the gastrointestinal tract is the stomach.
So, the correct answer is 'stomach'.

Digestion of proteins begins in the     (i)  and digestion of polysaccharides begins in the     (ii)     
(i)     (ii)

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. mouth, stomach

  2. stomach, small intestine

  3. stomach, mouth

  4. stomach, stomach

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Correct Option: C
Explanation:

(i) stomach

(ii) mouth
So, the correct answer is (c).

Which one of the following pairs of food components in humans reaches the stomach totally undigested? 

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Starch and fat

  2. Fat and cellulose

  3. Starch and cellulose

  4. Protein and starch

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Correct Option: B
Explanation:
  • In humans starch is digested in the buccopharyngeal cavity, protein is digested in the stomach and fat in the small intestine.
  • In Humans cellulose is not digested because in humans cellulose-digesting enzyme is absent.
  • In Humans fats are digested in the stomach and the cellusose digesting enzyme is absent The pairs of food components in humans reaches the stomach totally undigested are fats and cellulose.
  • So, the correct answer is 'Fat and cellulose'.

Which of the following statements is incorrect?

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Brunner's glands are submucosal.

  2. Irregular folds of gastric mucosa are rugae.

  3. Glisson's capsule is the connective tissue sheath of hepatic lobule.

  4. Mesothelium or serosa lies in close proximity to the circular layer of muscularis.

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Correct Option: D
Explanation:

The correct answer is (d).

Which of the following is a part of your digestive system?

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Stomach

  2. Teeth

  3. Rectum

  4. All of the above

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Correct Option: D
Explanation:

Digestion starts from the mouth and ends at large intestine. When the food enters mouth (ingestion), it is broken into small pieces by the teeth and acted upon by salivary amylase. Then it travels down the oesophagus to the stomach, where digestive enzymes from the pancreas, gall bladder, liver and duodenum further digest it. Assimilation of nutrients occurs at small intestine and absorption of water and other substances happen at the large intestine before it is egested or excreted. Thus, the correct answer is option D.

Which of the following inner lining of stomach is protected from hydrochloric acid?

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Pepsin

  2. Mucus

  3. Salivary amylase

  4. Bile

Show answer
Correct Option: B
Explanation:

 A layer of mucus along the inner walls of the stomach is vital to protect the cell linings of that organ from the highly acidic environment within it.