Tag: coordination in life processes

Questions Related to coordination in life processes

The wall of the stomach is protected against the action of HCl by ______________.

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

  1. Epidermal layer

  2. Mesodermal layer

  3. Mucous layer

  4. Muscular layer

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Correct Option: C

Gastric folds observed when the stomach is empty  are called ----------

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

  1. Fiveoles

  2. Ancinura angularis

  3. Rugae

  4. None

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Correct Option: C

Aurebach's plexus is present in between.

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

  1. Longitudinal and oblique muscles of stomach

  2. Oblique muscles and submucosa

  3. Circular and longitudinal muscles of stomach

  4. Submucosa and mucosa

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Correct Option: C

The greatly dilated part of the alimentary canal in man is?

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

  1. Buccal cavity

  2. Large intestine

  3. Stomach

  4. Caecum

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Correct Option: C

Proteolytic enzymes do not corrode lining of alimentary canal is

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

  1. They are secreted in inactive form

  2. Lining layer of alimentary canal does not contain protein

  3. The enzymes are not capable of digesting fat

  4. None of the above

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Correct Option: A

What will happen if secretion of parietal cells of gastric glands is blocked?

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

  1. Gastric juice is deficient of pepsinogen

  2. Gastric juice is deficient of chymosin

  3. Deficiency of HCl leads to nonconversion of inactive pepsinogen into active pepsin

  4. Nonrelease of enterokinase from duodenal mucosa and non-conversion of trypsinogen into trypsin

Show answer
Correct Option: C
Explanation:

Gastric glands are numerous microscopic tubular glands formed by the epithelium of stomach. The parietal cells (oxyntic cells) are large and most numerous on the sidewalls of gastric glands. They secrete hydrochloric acid and castle intrinsic factor. The peptic cells (zymogen) cells of gastric glands secrete gastric digestive enzymes as proenzymes-pepsinogen and prorennin and a small amount of gastric amylase and gastric lipase. The hydrochloric acid maintains a strongly acidic pH of about 1.5 to 2.5 in the stomach. HCl converts pepsinogen and prorennin to pepsin and rennin respectively. 

So, the correct answer is 'Deficiency of HCl leads to nonconversion of inactive pepsinogen into active pepsin'.

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

Show answer
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'.