Digestive Enzymes in the Stomach

Q.

How does pH affect enzyme activity?

Q.

What is the function of trypsin?

Q. Which one of the following enzymes helps in the digestion of milk proteins in infants?

1. Pepsin
2. Chymotrypsin
3. Rennin
4. Lactase

Q.

What are the 3 accessory organs of the digestive system?

Q.

Which of the following statements is not correct regarding lysosomes?

1. Lysosomes are membrane structures

2. Lysosomes have numerous hydrolytic enzymes

3. The hydrolytic enzymes of lysosomes are active under acidic pH

4. Lysosomes are formed by the process of packaging in the endoplasmic reticulum

Q.

Describe in sequence the digestion of proteins in the various regions of the alimentary canal in human beings. How are the end products of protein digestion absorbed into the body?

Q. The proteolytic enzyme found in the gastric juice of infants which helps in the digestion of milk proteins is

1. Trypsin
2. Amylase
3. Renin
4. Rennin

Q. The optimal pH for the action of pepsin is

1. 1.8
2. 6.8
3. 7
4. 7.8

Q.

What are the 3 main digestive enzymes?

Q.

The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall. What do we call the food then ?

Q.

Write about 4 disorders of the digestive system.

Q. Chylomicrons are absorbed via

1. intestinal mucosa
2. lacteal
3. micelles
4. blood vessels

Q.

What is the difference between trypsin and chymotrypsin?

Q.

The site of cellular respiration in an animal cell is

1. ribosome

2. mitochondria

3. endoplasmic reticulum

4. lysosome

Q.

What is the pH level of salivary amylase?

Q.

In which cell lysosomes are absent?

Q. Folds of mucosa in stomach are

1. villi
2. crypts
3. rugae
4. haustra

Q.

Name the enzymes of pancreatic juice, the substrates they digest, and the end products.

Q. Choose the correct enzyme – substrate pair.

1. carbohydrate – lipase
2. protein – amylase
3. maltase – lactose
4. rennin – casein

Q.

Which cell organelle is abundantly found in white blood cells, secretory cells of liver, kidney, tadpoles tail and helps in degenerating action?

1. Mitochondria

2. Golgi body

3. Lysosome

4. Endoplasmic reticulum

Q.

How does trypsin break down protein?

Q. What is the role of enzymes in digestive system?

Q. HCl secreting cells present in the stomach are

1. Peptic cells
2. Chief cells
3. Oxyntic cells
4. Mucus neck cells

Q.

What do you mean by digestion?

Q. What is the function of digestive enzyme?

Q.

Is pepsin acidic or basic?

Q. Enzyme Rennin is secreted by

1. Cells of stomach
2. Cells of intestine
3. The cortical cells of kidney
4. The cells of juxtaglomerular apparatus of kidney

Q.

What tissue make up the stomach?

Q.

3. Answer briefly:

a) Why are villi present in the intestine and not in the stomach?

b) How does pepsinogen change into its active form?

c) What are the basic layers of the wall of the alimentary canal?

d) How does bile help in the digestion of fats?

Q.

How do skin, lungs and liver help in excretion in mammals?