A cell may allow a large or charged chemical to move across thecytoplasmic membrane, down the chemical’s electrical and chemicalgradients, in a process called _______________.
A. active transport
B. facilitated diffusion
C. Endocytosis
D. pinocytosis
查看答案
Which of the following is most associated with facilitated diffusion?
A. Symports
B. antiports
C. carrier proteins;
D. endocytosis
内分泌系统是指分散在体内各个部位的内分泌腺体和具有内分泌功能细胞的总称。
A. 对
B. 错
鱼类的后腮腺与人类的甲状腺C细胞同源。
A. 对
B. 错
激素作用的特定部位称为“靶”（ target）,包括靶器官、靶组织和靶细胞。
A. 对
B. 错
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