Which layer in the wall of the gastrointestinal tract has an inner circular and outer longitudinal layer?

1. lamina propria	2. muscularis mucosa
3. submucosa	4. muscularis

A column-shaped cell found in the respiratory and intestinal tracts, which secretes the main component of mucus, is the:

The term brush border refers to:

The function of human gall bladder would be that it:
1. Synthesizes bile
2. Stores and concentrates bile
3. Secretes secretin
4. Secretes cholecystokinin

Emulsification of fats occurs in small intestine and it:
1. Results in the formation of small fat droplets
2. Depends upon the polar structure of bile salts
3. Results in the formation of chylomicrons
4. Depends upon the polar structure of bile pigments

Intrinsic factor helps in the absorption of:
1. Amino acids
2. Sodium
3. Glucose
4. Vitamin B-12

Enterokinase:

The large intestine functions in:
1. Bicarbonate secretion and bacterial action
2. Acid secretion and bacterial action
3. Water reabsorption and mass movements
4. Mixing action and intestinal hormone production

Which of the following is connected to the floor of the oral cavity by the frenulum?

The oxyntic or Parietal cells of the gastric mucosa secrete:
1. prorennin
2. pepsinogen
3. HCl and intrinsic factor
4. gastric lipase