A. Kidneys B. Liver C. Lungs D. Stomach

A. Left central lobe of liver B. Caudate lobe C. Right central lobe of liver D. Spegelian lobe

A. Lined by muscular tissue B. Provided with epithelial tissue C. Lined with both epithelial and muscular tissue D. Lined by all four layers

A. To dissolve enzyme secreted in stomach B. To maintain a low pH to prevent growth of microorganisms C. To maintain low pH to facilitate aborption D. To maintain low pH to activate pepsinogen to form pepsin

A. An enzyme converting trypsinogen into trypsin B. A hormone stimulating intestine C. A hormone inhabiting HCl secretion D. The inactive state of an enzyme

A. Lungs and intestine B. Placenta and intestine C. Plasma membrane D. Stomach and intestine

A. Colon B. Appendix C. Stomach D. None of these

A. HCl acid is too dilute B. The epithelial cells are resistant to the action of HCl acid C. HCl is neutralised by alkaline gastric juice D. The epithelial cells are covered with a mucous secretion

A. Saliva and gastric juice B. Saliva and pancreatic juice C. Gasric and pancreatic juice D. Gastric and duodenal juice

A. Crypts of liberkuhn B. Villi C. Peyer’s patches D. Brunner’s glands