Structure of Digestive System

Q.

At how many steps does decarboxylation occur in the Krebs cycle?

Q.

How is required pH maintained in the stomach and small intestine?

Q.

What is trypsin? What is its function?

Q.

How long is the esophagus in the human digestive system?

Q.

"Digestion of food begins in the mouth"- explain this statement by providing which secretion and enzyme are responsible for digestion.

Q.

What is meant by absorption, assimilation and egestion ?

Q.

Which of the following is the correct statement for Krebs cycle?

1. The waste product of the Krebs cycle is oxygen

2. Complete oxidation of food takes place in Krebs cycle involves step by step breakdown of pyruvic acid/lactic acid to produce ATP and CO₂

3. Electron carriers are produced by the Krebs cycle for the transportation of electron chain

4. None of the above

Q.

Digestion of food starts in ____and gets completed _____

Q.

8.'Bile does not contain any enzyme but it is essential for digestion' Explain the statement .

9.(a)Name the substances that get reabsirbed by the tubules .

(b)How are the lungs designed in human beings to maximize the area for the exchange of gases ?

10.(a) What will happen if ...Mucus is not secreted by the gastric glands .

(b) What will happen if ....Leaves of plants are covered with vaseline .

Q.

The exit of waste materials from the human alimentary canal is regulated by:

1. Large intestine

2. Anal sphincters

3. Mouth

4. Urethra

Q. Describe the complete process of digestion along with all the enzymes involved in it.

Q. In which of the following reactions of glycolysis does oxidation take place?

1. Glucose-6-phosphate to fructose-6-phosphate
2. Glyceraldehyde-3-phosphate to 1, 3-diphosphoglycerate
3. 1, 3-Diphosphoglycerate to 3-phosphoglycerate
4. 2-Diphosphoglycerate to phosphoglycerate

Q.

Alimentary canal is also known as food canal.

1. True
2. False

Q.

What is hymen?

Q. Explain the process of digestion of food in mouth and stomach in the human body.

Q.

Bolus is formed in the __________.

1. Mouth

2. Oesophagus

3. Stomach

4. Intestine

Q.

Question 4
Match the items of Column I with those given in Column II:
$\begin{array}{cc}& \\ ColumnI& ColumnII\\ Foodcomponents& Product\left(s\right)ofdigestion\\ Carbohydrates& Fattyacidsandglycerol\\ Proteins& Sugar\\ Fats& Aminoacids\end{array}$

Q.

Explain the process of digestion with respect to the following points :-

Assimilation Excretion Absorption e.t.c.

Q.

Label the figure of the digestive system.

Q. Food that enters the intestine from the stomach is called __________.​

1. chyle
2. chyme​
3. bolus
4. fundus

Q.

Question 5
How are fats digested in our bodies? Where does this process take place?

Q.

Caecum is meant for digestion of

1. Protein

2. Cellulose

3. Lipid

4. Starch

Q. The inner layer of oesophageal wall consists of longitudinal muscles.

1. True
2. False

Q.

Which of the following region of the human alimentary canal does not produce any digestive enzyme?

1. Oesophagus

2. Small intestine

3. Mouth

4. Stomach

Q.

The pathway by which food enters the body and solid wastes are expelled:

1. large intestine

2. small intestine

3. alimentary canal

4. liver

Q.

What is the role of hydrochloric acid in the stomach?

Q.

Where is dipeptidase active?

Q. How many types of enzymes in digestive system?

Q. what are the main charcteristics of an enzyme other than that it breaks down food into smaller molecules?

Q.

Succus entericus lacks

1. Lipase

2. Nucleosidase

3. Nuclease

4. Maltase