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

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

The mucosal layer in the stomach form irregular folds known as:-
1. villi
2. lumen
3. rugae
4. crypts of Lieberkuhn

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

Which cells of ‘Crypts of Lieberkuhn' secrete antibacterial lysozyme?

(1) Argentaffin cells

(2) Paneth oaks

(3) Zymogen cells

(4) Kupffer cells

A baby boy aged two years is admitted to play-school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

(1) Incisors

(2) Canines

(3) Premolars

(4) Molars

Which of the following guards the opening of hepatopancreatic duct into the duodenum ?

(1) Illeocaecal valve

(2) Pyloric sphincter

(3) Sphincter of Oddi

(4) Semilunar valve

In the stomach, gastric acid is secreted by the:-
(1) parietal cells

(2) peptic cells

(3) acidic cells

(4) gastrin secreting cells

The primary dentition in human differs from permanent dentition in not having one of the

following type of teeth

1. Canine                   

2. Premolars

3. Molars                   

4. Incisors

The enzyme that is not present in succus entericus is

(1) maltase

(2) nucleases

(3) nucleosidase

(4) lipase