Tag: digestive system - organs

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

The upper part of stomach is called ____ stomach. 

  1. fundic

  2. pyloric

  3. cardiac

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The fundus is the upper, rounded part of the stomach, located above the level of the cardiac orifice. The cardiac part is where the esophagus enters, and the pyloric part is the lower section leading to the duodenum.

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

What is the role of acid in our stomach?

  1. Acidify the food for proper action of pepsin

  2. Conversion of pepsinogen and prorenin into active forms of pepsin and renin

  3. Killing of microorganisms present in food

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

The gastric juice is made up of hydrochloric acid, pepsinogen and other digestive enzymes, gastrin, mucus, and bicarbonates. It has a pH ranging from 1 to 2. Its low pH is essential in activating digestive enzyme such as pepsinogen and convert it into the active pepsin, a Proteolytic activity of pepsin and in destroying various pathogens. 

Thus, the correct answer is option D.

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

Function of hydrochloric acid in the stomach is to

  1. Digest carbohydrates

  2. Clean the stomach

  3. Kill the germs

  4. Break down proteins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The stomach wall consists gastric gland which secretes gastric juice for digestion of food. The gastric juice is made up of hydrochloric acid, pepsinogen and other digestive enzymes, gastrin, mucus, and bicarbonates. It has a pH ranging from 1 to 2. Its low pH is essential in activating many digestive enzymes and in destroying various pathogens. Thus, the correct answer is option C.

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

Gastric digestion takes place efficiently in

  1. Acidic medium

  2. Alkaline medium

  3. Neutral medium

  4. Highly alkaline medium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The gastric juice is made up of hydrochloric acid, pepsinogen and other digestive enzymes, gastrin, mucus, and bicarbonates. It has a pH ranging from 1 to 2. Its low pH is essential in activating many digestive enzymes and in destroying various pathogens. So, gastric digestion takes place efficiently in acidic medium
So, the correct answer is 'Acidic medium'
Multiple choice bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

The original function of the vertebrate stomach was

  1. Storage

  2. Digestion

  3. Enzyme secretion

  4. Absorption
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to the body's needs, the stomach decides what to do with the food. If the small intestine is full and busy absorbing molecules from a previous meal, for instance, the stomach temporarily stores the food. On the other hand, if the body is in need of nutrients and the small intestine is ready for absorption, the stomach begins to break down the macromolecules found in the food and creates a semi-liquid mixture called chyme. This decision-making step of the stomach helps control the pace of the digestive system. The stomach of vertebrates is able to break down macromolecules due to its highly acidic environment, which causes molecular bond stress and forces them to break. So, the original function of the vertebrate stomach was storage but, due to acidic medium it also breaks down the food. Thus, option A is correct.

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

The food passes through

  1. Mouth

  2. Oesophagus

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During digestion process fist food is ingested by mouth where chewing churning and mixing of food take place and make semi solid paste of food called as a bolus. Bolus then enters into the oesophagus where food moves through peristaltic movement and enters into the stomach. Thus, the correct answer is option C.

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

The internal secretion of ............ helps in digestion.

  1. Citric acid

  2. Sulphuric acid

  3. Acetic acid

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

The stomach wall secretes gastric juices and a mixture of HCl, pepsinogen and mucous. HCl increases the pH of the stomach due to which pepsinogen gets activated and gets converted into the active form pepsin which digests the protein molecule. Thus, the correct answer is option D. 

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

How is shape of stomach?

  1. As V

  2. As J

  3. As O

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The stomach is a J-shaped, hollow organ located just inferior to the diaphragm in the left part of the abdominal cavity. It is located between the oesophagus and connects with the duodenum. It has two parts fundus and pyloric. 

Therefore, the correct answer is option B.

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

The gastric mill is the part of the stomach that is used for

  1. Storage

  2. Digestion

  3. Excretion

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

    The gizzard also referred to as the ventriculus, gastric mill, and gigerium is an organ found in the digestive tract of some animals, including crocodiles, alligators, dinosaurs, birds, earthworms, some fish, and some crustaceans.  This specialized stomach is constructed of thick muscular walls used for grinding up food. In certain insects and molluscs, the gizzard features chitinous plates or teeth. Hence, the gastric mill is the part of the stomach that is used for grinding.

    So, the correct answer is 'grinding'.