Most of the digestion occurs in 

1. rectum

2. stomach

3. duodenum

4. small intestine

Which one of the following pairs of food components in humans reaches the stomach totally undigested? 

1. Protein and starch

2. Starch and fat

3. Fat and cellulose

4. Starch and cellulose

Where is protein digestion accomplished?

1. Stomach

2. lleum

3. Rectum

4. Duodenum

The portion of human stomach into which the oesophagus opens is the:-
1. Cardiac
2. Fundus
3. Corpus
4. Pylorus

To move into the intestinal mucosa, fatty acids and glycerol are first incorporated into:

1. Chyle

2. Micelles

3. Chylomicroms

4. Lipoproteins

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 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

The following is a scheme showing the fate of carbohydrates during digestion in the

human alimentary canal. Identify the enzymes acting at stages indicated as A, B, C

and D. Choose the correct option from those given.

1. A = Amylase, B = Maltase, C = Lactase,D = Invertase

2. A = Amylase, B = Maltase, C = Invertase,D = Lactase

3. A = Amylase, B = Invertase, C = Maltase, D = Lactase

4. A = Amylase, B = Lactase, C = Maltase, D = Invertase

The oesophagus and trachea (wind pipe) open into:

1. Gullet

2. Glottis

3. Larynx

4. Pharynx

Our stomach is:

1. U-shaped

2. J-shaped

3. C-shaped

4. Rod-shaped