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 |
 89%
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 |
 79%
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 |
 87%
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 |
 64%
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 |
From NCERT
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Which of the following glandular secretions involved in digestion would be most likely released initially as inactive precursors ?

(1) protein-digesting enzymes

(2) fat-solublizing bile salts

(3) acid-neutralising bicarbonate

(4) hormones such as gastrin

Subtopic:  Pancreatic Secretions |
 75%
From NCERT
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What prevents the backflow of fecal matter into the small intestine?

1. Ileo-caecal valve

2. Sphincter of Boyden

3. Meckel's diverticulum

4. Plicae semilunaris

Subtopic:  Absorption: Part 2 |
 92%
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 |
 91%
From NCERT
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The mucosal layer in the stomach form irregular folds known as:-
1. villi
2. lumen
3. rugae
4. crypts of Lieberkuhn

Subtopic:  Peristalsis: Gland in Alimentary Canal |
 85%
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 |
 87%
From NCERT
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