On the anterior surface of the trunk, the anterior branches of the thoracic nerves present about the level of ()
A. T2----the nipple
B. T4----the xiphoid process
C. T6----the costal arch
D. T10----the umbilicus
E. T12----the anterior superior iliac spine
查看答案
The resting potential of a neuron modifies from -70mV to -60mV. This phenomenon is called as ()
A. depolarization
B. hyperpolarization
C. repolarization
D. polarization
E. overshoot
Repolarized phase of action potential in neuron is induced by ()
A. Na+ influx
B. K+ influx
Ca2+ influx
D. K+ efflux
E. Cl- efflux
The transporting of O2 across cell membrane is ()
A. facilitated diffusion
B. simple diffusion
C. exocytosis
D. active transport
E. endocytosis
The environment in which the cells live directly is called ()
A. intracellular fluid
B. blood plasma
C. extracellular fluid
D. cerebrospinal fluid
E. interstitial fluid
微信支付 
支付宝支付