Tag: process of digestion

Questions Related to process of digestion

Which part of the mammalian alimentary canal does not secrete any enzyme?

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

  1. Mouth

  2. Oesophagus

  3. Stomach

  4. Duodenum

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Correct Option: B
Explanation:

'Oesophagus' does not secrete any enzyme.

So the correct option is B.

J-shaped muscular bag that churns the food is 

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

  1. Small intestine

  2. Stomach

  3. Large intestine

  4. Oesophagus 

Show answer
Correct Option: B
Explanation:

Stomach: It is a muscular J- shaped thickly walled bag. Stomach churns the food to mix digestive juices. The food in the stomach is churned into semi-solid. The churned semi-solid food is called chime.

So, the correct answer is 'Stomach'.

A muscular structure that regulates the opening of the oesophagus into the stomach is known as

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

  1. Epiglottis

  2. Lower esophagus sphincter

  3. Pyloric sphincter

  4. Sphincter of Oddi

Show answer
Correct Option: B
Explanation:
A. The epiglottis is a leaf-shaped cartilaginous flap located behind the tongue. It prevents the entry of food in the windpipe by sealing off the windpipe while eating the food.
B. Lower oesophagus sphincter, also known as a cardiac orifice, is the opening of the oesophagus into the stomach. It regulates the opening of the oesophagus into the stomach.
C. Pyloric sphincter is found between the duodenum and posterior stomach. It regulates the opening of the duodenum into the stomach.
D. Sphincter of Oddi is the opening of the hepatopancreatic duct into the duodenum.
So, the correct answer is 'Lower oesophagus sphincter'.

Select the incorrect match

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

  1. Stomach wall - Oblique muscle layer present

  2. Chylomicrons - Product of emulsification in intestinal lumen

  3. Thaimine deficiency- - Beri beri

  4. None of the above

Show answer
Correct Option: D
Explanation:

All the above options are correct.So, the correct option is 'None of the above'.

Single-layer of flattened cells with boundaries is observed in all of the following except

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

  1. Blood vessels

  2. Lining of oesophagus

  3. Air sacs of lungs

  4. Both (A) and (B)

Show answer
Correct Option: B
Explanation:

Single layered of flattened cells with irregular boundaries constitute the squamous epithelium which is found in walls of blood vessels and air sacs of lungs. The epithelium that lines the oesophagus is stratified epithelium.

So, the correct option is 'lining of the oesophagus'.

Middle part of oesophagus in human being is

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

  1. Voluntary only

  2. Involuntary only

  3. Both voluntary and involuntary

  4. Skeletal muscles

Show answer
Correct Option: C
Explanation:
  • The oesophagus is a hollow, muscular tube that connects the mouth to the stomach and also carries food and liquids to the stomach from the mouth.
  • It is usually around 9 to 10 inches in adults which begins at the pharynx and passes behind the trachea or windpipe.
  • The upper part of the oesophagus is made up of striated or voluntary muscles.
  • The middle part is composed of both striated and smooth or involuntary muscles.
  • The lower part is made up of smooth muscles only.
  • The oesophagus consists of two sphincters.
  • The upper oesophagal sphincter is single ringlike cartilage which is both voluntary and involuntary in nature and it prevents food and liquids from entering the windpipe (trachea,)
  • The lower oesophagal sphincter is involuntary and prevents gastric acids from travelling into the oesophagus and it opens into the diaphragm.
  • So, the correct answer is 'Both voluntary and involuntary'.

The most distensible portion of the alimentary  canal is ________.

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

  1. Oesophagus

  2. Stomach

  3. Large intestine

  4. small intestine

Show answer
Correct Option: B
Explanation:
  • The oesophagus is a hollow distensible muscular part of the alimentary canal.
  • The ability to stretch and expand is called distensibility.
  • The distensibility of the oesophagus allows any kind of food to pass through it with ease.
  • The oesophagus dilates and propels the food from the region of the pharynx to the stomach.
  • The stomach is a J shaped distensible bag like structure and is a highly distensible part of the alimentary canal.
  • It may take varying shapes and can hold about 1 litre of food.
  • The gastric folds in the inner walls of the stomach allow it to get expanded.
  • So, the correct answer is 'Stomach'.

What is the function of peristalsis in these parts?

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

  1. Oesophagus

  2. Stomach

  3. Small intestine

  4. Large intestine

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Correct Option: A

Typhlosole found in Pheretima occurs in?

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

  1. Oesophagus

  2. Stomach

  3. Intestine

  4. Gizzard

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Correct Option: A

The wall of alimentary canal from oesophagus to rectum possesses _________ layers.

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

  1. $2$

  2. $3$

  3. $4$

  4. $5$

Show answer
Correct Option: A