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【单选题】
扩散和主动运输的共同点是A.
顺浓度梯度
B.
逆浓度梯度
C.
需要消耗能量
D.
不消耗能量
E.
需要载体蛋白
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反馈参考答案：
举一反三
【单选题】The ileum connects to the colon through a sphincter called the ____ valve.
A.
ileoduodenal
B.
ileojejunal
C.
ileocecal
D.
ileorectal
【简答题】产品成本分为哪几种?
【简答题】俯视图反映物体左右、前后的位置关系,即反映物体的( )和( )。
【单选题】The following statements concerning the ileum are true excep
A.
The circular smooth muscle of the lower end of the ileum serves as a sphincter at the junction of the ileum and the cecum.
B.
The branches of the superior mesenteric artery serving the ileum form more arcades than those serving the jejunum.
C.
Peyer’s patches are present in the mucous membrane of the lower ileum along the antimesenteric border.
D.
The plicae circulares are more prominent at the distal end of the ileum than in the jejunum.
E.
The parasympathetic innervation of the ileum is from the vagus nerves.
【单选题】One way to distinguish the jejunum from the ileum is that:
A.
Its external surface is characterized by haustra
B.
It contains fewer epiploic appendages than the ileum
C.
It lies in the left upper quadrant
D.
It lies intraperitoneal while the ileum lies retroperitoneal
E.
It is lined by stratified squamous epithelium
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