The optimum pH for the enzyme salivary amylase is:

(1) 4.5

(2) 6.8

(3) 7.3

(4) 8.2

Subtopic:  Accessory Digestive Glands |
 93%
From NCERT
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Intrinsic factor is secreted by the_cells of the human stomach.

1. Mucus neck cells
2. Chief cells
3. Oxyntic cells
4. G-cells

Subtopic:  Gastric Secretions |
 84%
From NCERT
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Lipases can be activated by: 

1. Enterokinase

2. Enterogastrone

3. Chyme

4. Bile

Subtopic:  Intestinal Secretions |
 66%
From NCERT
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Which of the following is a sub-mucosal gland ?

(1) Oxyntic glands of stomach

(2) Crypts of Lieberkuhn of small intestine

(3) Brunner's glands of the duodenum

(4) Goblet cells

Subtopic:  Peristalsis: Gland in Alimentary Canal |
 88%
From NCERT
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To move into the intestinal mucosa, fatty acids and glycerol are first incorporated into:

(1) Chyle

(2) Micelles

(3) Chylomicroms

(4) Lipoproteins

Subtopic:  Movement of Food in Gut |
 69%
From NCERT
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A mass peristaltic movement is responsible for:-

1. Release of bile and pancreatic juice into the duodenum
2. Passage of chyme from stomach to duodenum
3. Vomiting
4. Defecation

Subtopic:  Peristalsis: Gland in Alimentary Canal |
 54%
From NCERT
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What prevents the back flow of the fecal matter into the small intestine?

1. Ileo-caecal valve

2. Sphincter of Boyden

3. Meckel's diverticulum

4. Plicae semilunaris

Subtopic:  Movement of Food in Gut |
 96%
From NCERT
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Many of the pancreatic enzymes must be activated by trypsin before they can begin digesting food. but trypsin itself requires the activating effect of :-

1. chymotrypsin

2. carboxypeptidase

3. phospholipase

4. enterokinase

Subtopic:  Pancreatic Secretions |
 88%
From NCERT
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The parietal cells or the oxyntic cells located in the stomach's gastric pits mainly secrete:-
1. HCI and Intrinsic factor
2. Pepsinogen and Gastric lipase
3. Pepsinogen and Pro-rennin
4. Gastrin and Mucus

Subtopic:  Gastric Secretions |
 95%
From NCERT
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What regulates the opening of oesophagus into the stomach?

1. A membranous valve

2. A muscular sphincter

3. A mesodermal septum

4. A cartilaginous flap

Subtopic:  Movement of Food in Gut |
 92%
From NCERT
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