Which one of the following statement is true regarding digestion and absorption of food in humans?

1. Oxyntic cells in our stomach secrete the  proenzyme pepsinogen

2. Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier protein

3. Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries

4. About 60% of starch is hydrolysed by salivary amylase in our mouth

Where is protein digestion accomplished?

1. Stomach

2. lleum

3. Rectum

4. Duodenum

A certain person eats boiled potato; one of the food component in it is 

1. lactose which is indigestible

2. starch which does not get digested

3. cellulose which is digested by intestinal cellulos

4. DNA which gets digested by pancreatic DNAase

Calcium deficiency occurs in the absence of vitamin

1. D

2. C

3. E

4. B

In man the zymogen or chief cells are mainly found in 

1. cardiac part of stomach

2. pyloric part of stomach

3. duodenum

4. fundic part of stomach

Which part of body secretes the hormone secretin ?

1. Oesophagus

2. Duodenum

3. Stomach

4. lleum

The layer of cells that secret enamel of tooth is: 

1. dentoblast

2. ameloblast

3. osteoblast

4. odontoblast

The contraction of gall bladder is due to

1. gastrin

2. secretin

3. cholecystokinin

4. enterogasterone

Brunner's glands occur in

1. sub-mucosa of duodenum

2. sub-mucosa of stomach

3. mucosa of oesophagus

4. mucosa of ileum

During prolonged fasting, in what sequence are the following organic compounds used up by the body ?