生理学习题——第二章 细胞的基本功能（Physiological learning questions -- the second chapter the basic functions of cells）.docVIP

生理学习题——第二章 细胞的基本功能（Physiological learning questions -- the second chapter the basic functions of cells） Physiological learning questions -- the second chapter: the basic functions of cells First, individual choice questions 1. threshold potential refers to A. causes the critical membrane potential of the membrane to suddenly increase the permeability of K+ B. results in the critical membrane potential of the membrane to increase Na+ permeability C. results in the critical membrane potential of the membrane to increase K+ permeability D. causes the critical membrane potential of the membrane to suddenly increase the permeability of Na+ E. causes the critical membrane potential of the membrane to increase the permeability of Na+ and K+ suddenly [answer] D 2. skeletal muscle excitation contraction coupling ion plays a key role in A.Na+ B.K+ C.Ca2+ D.Cl- E.Mg2+ [answer] C 3. when resting, the positive and negative stable state outside the cell membrane is called A. polarization B. hyperpolarization C. reverse polarization D. repolarization E. depolarization [answer] A The formation and maintenance of Na+ and K+ concentrations are normal within and outside the 4. cell membrane When A. film is quiet, K+ permeability is large When the B. membrane is excited, the permeability of Na+ increases Results of facilitated diffusion of C.Na+ The effect of Na+-K+ pump on D. membrane The combined action of Na+-K+ pump and Ca2+ pump on E. membrane [answer] D The 5. nerve cell action potential rise branch is due to A.K+ internal flow B.Cl- outflow C.Na+ internal flow D.Na+ outflow E.K+ outflow [answer] E In 6., the movement of K+ in the cell membrane toward the membrane is passed A. simple diffusion Facilitation of B. C. active transport D. exocytosis E. passive transport [answer] B 7. common signs that excitable tissues produce excitement are A. gland secretion B. gland secretion C. produces nerve impulses D. produces action potential E. produces local potential [answer] D The chemica