肠上皮中最主要的细胞类型是（ ） A: 杯状细胞(Goblet cells) B: 潘氏细胞(Paneth Cells) C: 肠内分泌细胞( Enteroendocrine cells) D: 肠细胞（enterocyte）

Individuals with cirrhosis frequently display elevated levels of amino acids in the blood. The source of these amino acids is predominantly which one of the following A: Red blood cell turnove B: Liver protein turnove C: Enterocyte degradation and turnove D: Muscle protein turnove E: Plasma protein turnove