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

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

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

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

Muscularis layer in the wall of the alimentary canal is formed by smooth muscles usually arranged into:-

1. an inner circular and an outer longitudinal layer.
2. an inner longitudinal and an outer circular layer.
3. both circular layers
4. both longitudinal layers

Which of the following gastric secretory cells is correctly matched with its secretion(s) ?

1. Chief cells - gastrin

2. parietal cells -- hydrochloric acid and intrinsic factor

3. enteroendocrine cells -- mucus and hormones

4. mucous cells -- pepsinogen and mucus

Sphincter of Oddi will guard the opening of

1. A

2. B

3. C

4. D

The intrinsic nervous system that is responsible for peristalisis is present in which part shown in the given transverse section of the human gut ?

1. A

2. B

3. C

4. D

Study the given diagram and choose the correct statements :

I. A is involved in the absorption of fatty acids

II. B is a crypts

1. Only I

2. Only II

3. Both I and II

4. Neither I nor II

In the given diagram showing anatomical regions of the human stomach, A,B and C respectively represent :

1. Fundus, Cardia and Pylorus

2. Cardia, Pylorus and Fundus

3. Fundus, Pylorus and Cardia

4. Pylorus, Cardia and Fundus