GASTRIC SECRETIONS

Choose the FALSE statement about OXYNTIC (GASTRIC) gland :

• Secrete hormone gastrin

• Secrete intrinsic factor

• Mainly secrete mucus

• Secrete hydrochloric acid

Regarding hydrochloric acid secretion :

• It mainly involves hydrogen-potassium channel

• Bicarbonate ion is transported via antiporter with chloride

• Hydrogen ion is secreted to ECF

• Carbonic anhydrase does not involves in its secretion

Basic factors that stimulate gastric secretion are those EXCEPT :

• Mucus

• Acetylcholine

• Histamine

• Gastrin

Regarding pepsinogen secretion :

• It is required for fat digestion

• Secreted by the pyloric gland

• Convert in its active form only in acidity environment

• Secreted by enterochromaffin-like cells (ECL)

Those are phases of gastric secretion EXCEPT :

• Intestinal phase

• Gastric phase

• Cephalic phase

• Esophageal phase

Those are true regarding gastrin (G) cell EXCEPT :

• It is located in pyloric gland

• It can also directly stimulates release of acid in stomach

• Stimulated by protein-containing food

• Indirectly stimulates release of acid via histamine

All of the following increase gastrin secretion EXCEPT :

• secretin

• Calcium

• Epinephrine

• Increase vagal discharge

Which of the following is the site of secretion of intrinsic factor?

• Gastric antrum

• Gastric fundus

• Duodenum

• Ileum

A 45-year-old man presents with abdominal pain and vomiting blood. Endoscopy revealed a

chronically perforated gastric ulcer. Which of the following is a forerunner to gastric ulcer formation?

• Tight junction between cells

• Mucus secretion

• Back-leak of hydrogen ions

• Proton pump inhibition

A 71-year-old man presented with chronic gastritis condition. Secretion of which substances is most likely to be diminished in this patient?

• Intrinsic factor

• Extrinsic factor

• Ptyalin

• Secretin