1. Which of the following hormone helps in secretion of HCL from stomach?
a) Renin
b) Gastrin
c) Secretin
d) Pepsin
Explanation: Gastrin is a hormone that is produced by g cells in the lining of the stomach and upper small intestine. Gastrin stimulates the stomach to release gastric acid.
2. Gastric juice has a ph of about ___________
a) 6
b) 10
c) 7
d) 2
Explanation: The ph of gastric juice is acidic. They range between 1.5 to 2.5.
3. . ___________ sphincter prevents regurgitation of food from the stomach.
a) Cardiac
b) Sphincter of oddi
c) Bimitral valve
d) Villi
Explanation: Cardiac sphincter prevents acidic content of the stomach from moving upward into the food pipe. It is found at the lower end of the esophagus.
4. Which among the following is the longest?
a) Stomach
b) Esophagus
c) Small intestine
d) Large intestine
Explanation: Small intestine is the longest part of the alimentary canal. It is about 20ft or 6metres long. It is narrow and tubular part occupying the central and lower parts of abdominal cavity.
5. The opening of Ileum is guarded by ___________
a) Ileo caecal valve
b) Mitral valve
c) Sphincter
d) Villi
Explanation: The opening of Ileum is guarded by Ileo caecal valve. It prevents regurgitation of food from caecum. Ileum is highly coiled
6. Secretin and cholecystokinin are digestive hormones. These are secreted by __________
a) Esophagus
b) Stomach
c) Ileum
d) Duodenum
Explanation: Duodenum is the widest shortest and most flexible part of small intestine. It forms a c shaped curve. It receives bile-pancreatic duct.
7. The food that enters the intestine from stomach is called ___________
a) Chyme
b) Fundus
c) Chyle
d) Bolus
Explanation: Chyme is a semi fluid mass of partly digested food that is expelled from stomach through pyloric valve into duodenum
8. In which of the following putrefying bacteria are present?
a) Colon
b) Intestine
c) Liver
d) Kidney
Explanation: Colon is found in large intestine. It is a long sized sacculated structure which is differentiated into4 regions. They are ascending colon, transverse colon, descending colon and sigmoid colon.
9. Which among the following is vestigial in function?
a) Duodenum
b) Vermiform appendix
c) Peyer’s patch
d) Plicae circulares
Explanation: Vermiform appendix and Caecum are vestigial function. Since these are not involved in cellulose digestion
10. Large intestine is divided into _________ parts.
a) 3
b) 2
c) 1
d) 4
Explanation: Large intestine is about 5feet long, shorter but it is wider. It forms an arc around small intestine. It is formed of 3 parts. They are caecum, colon and rectum.