Tag: digestive system - organs

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Questions Related to digestive system - organs

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


Which of the following correctly describes the oesophagus?

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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'. 
Multiple choice bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion


The acidic region of gastrointestinal tract is

  1. mouth

  2. large intestine

  3. small intestine

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

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

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

  1. Starch and fat

  2. Fat and cellulose

  3. Starch and cellulose

  4. Protein and starch
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

Which of the following statements is incorrect?

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

The correct answer is (d).

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

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

  1. Stomach

  2. Teeth

  3. Rectum

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.