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单选题 Phase 0 depolarization of action potential of sinoatrial node cells is caused by( )
学科：生理学（60学时）
时间：2025-06-23 08:08:58
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题目1单选题
Phase 0 depolarization of action potential of sinoatrial node cells is caused by( )A. K + efflux decrease and the flow of Na +(If) into the cellB. Ca 2+ influx via L-type calcium channelsC. Na + influx via fast sodium channelsD. The flow of K + out and Ca 2+ into the cell
题目2单选题
Which one is not cerebellum's function? ( )A. BalanceB. Stretch reflexC. Muscle tonusD. Muscle coordination
题目3单选题
"Rh-positive"means that erythrocyte membrane has ( )A. C antigenB. A antigenC. E antigenD. D antigen
题目4单选题
Energy metabolism of resting individual is most stable in which rage of environmental temperature( )A. 0~35℃B. 18℃C. 10℃D. 20~25℃
题目5单选题
The basic center for regulating body temperature is located in ( )A. the midbrainB. the medulla oblongataC. the hypothalamusD. the spinal cord
题目6单选题
Diabetes is related closely to the secretion of ( )A. growth hormoneB. insulinC. sex hormoneD. thyroid hormone
题目7单选题
The formation of excitatory postsynaptic potential is mainly due to( )A. K+ outflowB. K+ inflowC. C1- inflowD. Na+ inflow
题目8单选题
Which of the following descriptions of synaptic transmission is incorrect? ( )A. No need for Ca2+ participationB. Summation can occurC. Time delaysD. One-way transmission
题目9单选题
Which of the following is not the common properties of hormone action?( )A. InteractionsB. Second messengersC. High specificityD. Amplification effect
题目10单选题
Resting potential mainly results from( )A. Na +-Ca 2+ exchangeB. K+ effluxC. Na + influxD. Ca 2+ influx
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