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
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A. Peptic cells B. Zymogen cells C. Oxyntic cells D. Goblet cells
A. Sanguivorous B. Frugivorous C. Coprophagus D. Detrivorous
A. Pinocytic vesicles B. Phagocytic vesicles C. Zygomen granules D. Microvilli
A. the vagus serve B. cerebellum C. medulla oblongata D. cerebral peduncle
A. Golgi bodies B. Chromosome C. Ribosome D. Mitochondria
A. Lesser oxygen in the atmosphere B. More CO in the air C. Less RBC in the blood D. All of these
A. Prothrombin B. Calcium C. Plasminogin D. Heparin
A. 80 mg/100 ml B. 100 mg/100 ml C. 140 mg/100 ml D. 160 mg/100 ml
A. Tunica externa B. Tunica media C. Tunica intima D. None