Oesophagus & Stomach

Q.

1. Define nutrition. List the 5 steps involved in it.

Q.

HCl Is secreted by which of the following cells of the stomach?

1. Cheif cells

2. Peptic cells

3. Goblet cells

4. Parietal Cell (Oxyntic Cells)

Q.

The enzyme pepsin converts proteins into_________

Q.

Why the medium of small intestine has to be made alkaline?

Q. 1. If you chew chapatti for long, after some time it taste sweet ? Why is this so ?

Q.

What is the function of the pyloric sphincter?

Q.

Which enzyme is responsible for digesting proteins in the stomach?

Q.

The acid present in the stomach

1. Kills the harmful bacteria that may enter along with the food.

2. Protects the stomach lining from harmful substances.

3. Digest starch into simpler sugars.

4. Makes the medium alkaline.

Q. The exit of food from the stomach to ___________ is regulated by _______.

[0.8 Mark]

1. oesophagus, anal sphincter
2. small intestine, sphincter muscle
3. colon, sphincter muscle
4. gall bladder, anal sphincter

Q.

During digestion, fats are broken down into _______________.

Q.

Digestion of proteins starts in:

1. Pancreas

2. Mouth

3. Stomach

4. Small intestine

Q. Observe the diagram of the human digestive system. The labels (i) to (iv) represent the different parts of the digestive system. Match the correct part of the digestive system in column I to its corresponding function in column II.

Column I	Column II
i	a) Increases the efficiency of lipase enzyme action
ii	b) Responsible for absorption of more water from undigested food
iii	c) Stores bile
iv	d) Digestion of food is taken care of by gastric glands present here

1. i - c) ; ii – b) ; iii – d) ; iv- a)
2. i - a) ; ii – d) ; iii – b) ; iv- c)
3. i - c) ; ii – a) ; iii – d) ; iv- a)
4. i - d) ; ii – a) ; iii – c) ; iv- b)

Q.

The inner lining of stomach is protected by one of the following from the harmful effect of hydrochloric acid. This is :
(a) pepsin (b) mucus (c) saliva (d) bile

Q. Why does our stomach produces pepsinogen first and not directly pepsin????

Q.

Name the component of food that is not digested in the stomach.

Q. Which of the following statements are true regarding stomach?

Statement 1: Inside stomach, proteins are digested by hydrochloric acid.

Statement 2: Stomach wall is protected by mucous membrane.

1. Only statement 2 is true
2. Only statement 1 is true
3. Both the statements are true
4. Both the statements are false

Q.

The exit of unabsorbed food material is regulated by:

1. Liver

2. Anus

3. Small intestine

4. Anal sphincter

Q. If hydrochloric acid is so strong that it can break complex food molecules, why does it not affect the walls of stomach?

1. Stomach is internally protected by mucous membrane which prevents the action of HCl.
2. Pepsin is basic which neutralizes HCl and prevents damage to stomach.
3. All of these
4. Salivary amylase secreted in the mouth still remains in the bolus which prevents damage to the stomach.

Q. WHY DON'T TRACHEA OR WINDPIPE DOESNT COLLAPSE WHEN THERE IS NO AIR INSIDE? PLEASE PROVIDE EXPLANATION!

Q.

Where are proteins first digested in the alimentary canal ? (a) small intestine (b) oesophagus (c) mouth (d) stomach

Q. The constituents of secretions by gastric glands are:

1. Pepsin
2. Mucous
3. Hydrochloric Acid
4. Amylase

Q.

Name the bacteria which causes peptic ulcer.

Q. In which medium is pepsin active?

1. Neutral
2. Acidic
3. Alkaline
4. Isotonic

Q.

What is the other name of food pipe ?

Q.

Question 51
What will happen if mucus is not secreted by the gastric glands?

Q.

Amoeba does not have special _____ organs like human beings.

Q. What is the difference between trypsin and pepsin?

Q.

Name the excretory organs in:

(i) Amoeba

(ii) Insects

(iii) Earthworm

Q.

Question 64
What are the functions of gastric glands present in the wall of the stomach?

Q.

Where Does Carbohydrate Digestion Begin?