MRCP UK EXAMINATIONS

ABDOMINAL

GASTROINTESTINAL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
what are the overall functions of gastrin? (select more than one option)
A
Stimulate Gastric Acid and pepsin secretion
B
Growth of gastric mucosa and intestinal mucosa
C
Stimulate Gastric Motility
D
Contraction of muscle at gastro esophageal junction cardiac sphincter prevents reflux
Explanation: 

Detailed explanation-1: -These studies show: a) gastrin does not cause sphincter contraction by stimulating cholinergic neurons: and b) gastrin does not exert an inhibitory effect on the sponcter pressure by stimulating H2 receptors. We suggest that gastrin may contract the lower esophageal sphincter by a direct action on the sphincter muscle.

Detailed explanation-2: -The primary function of the esophagus is to transport food entering the mouth through the throat and into the stomach.

Detailed explanation-3: -Constriction of the upper and lower esophageal sphincters helps to prevent reflux (backflow) of gastric contents and acid into the esophagus, protecting the esophageal mucosa.

There is 1 question to complete.