填空题毛细血管在电镜下分为( )、( )、( ),其三个基本功能是( )、( )、( )。
问答题食入的蛋白质在小肠内分解为氨基酸后经小肠哪些结构进入血液,然后经何途径入肝? 入肝后又经过哪些结构进入肝细胞? (5分)
单项选择题Whih of the following statements regarding the cerebrospinal fluid is FALSE
单项选择题Adrenocorticotropic hormone (ACTH) is produced by which of the following cells
单项选择题Which of the following are present in elastic arteries but are NOT seen in muscular arteries