第二章单元测试
- The manner that oxygen enter into the cell is （ ）
- How many the energy will be used by Na+ pump in a cell?（ ）
- The imbalance distribution of Na+ and K+ inside and outside the cell it due to _____.（ ）
- The neurotransmitter at the neuromuscular junction is （ ）
- During the absolute refractory period, the excitability of tissues is （ ）
- The amplitude of AP of the neuron is close to（ ）
- If the duration of an action potential of the myelinated nerve fiber lasts 2ms，the number of the action potentials per second cannot exceeds ___ in theory.（ ）
- In the depolarization phase of an action potential, Na+ moves into the cell by ___.（ ）
- The depolarizing phase of AP of a neuron is formed by（ ）
- In which period of the preceding excitation in a nerve fiber, the next excitation cannot appear?（ ）
A:endocytosis B:active transport C:exocytosis D:simple diffusion E:facilitated diffusion
答案:simple diffusion
A:5% - 10% B:30% - 40% C:20% - 30% D:60% - 70% E:10% - 20%
答案:20% - 30%
A:the effect of Na+ pump B:the result that Na+ and K+ moving across the cell membrane by facilitated diffusion C:the high permeability of cell membrane to K+ in rest condition D:the effect of ATP E:the increase of the permeability of the cell membrane to Na+ when excited
答案:the effect of Na+ pump
A:GABA B:5-HT C:noradrenaline D:ACh E:adrenaline
答案:ACh
A:zero B:equal to the normal C:less than the normal D:infinity E:greater than the normal
答案:zero
A:overshoot value B:Na+ equilibrium potential C:the sum of RP and Na+ equilibrium potential D:K+ equilibrium potential E:the difference of RP and Na+ equilibrium potential
答案:the difference of RP and Na+ equilibrium potential
A:600 times B:200 times C:300 times D:500 times E:400 times
答案:500 times
A:the facilitated diffusion mediated by carrier B:the facilitated diffusion mediated by channel C:secondary active transport D:simple diffusion E:endocytosis
答案:the facilitated diffusion mediated by channel
A:Na+ influx B:K+ efflux C:Ca2+ influx D:Cl- influx E:deactivation of Na+ channel
答案:Na+ influx
A:the effective refractory period B:the supranormal period C:the subnormal period D:the relative refractory period E:the absolute refractory period
答案:the absolute refractory period
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