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【单选题】
磺酰脲类降血糖作用环节是A.
直接刺激胰岛B细胞释放胰岛素，使内源性胰岛素增加
B.
可增强外源性胰岛素的降血糖作用
C.
增加葡萄糖的转运
D.
抑制糖原的分解和糖异生
E.
对胰岛功能完全丧失者也有效
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举一反三
【单选题】Which one is correct about the AP conduction velocity of nerve fiber
A.
Increase of the temperature within physiological limit will increase the conduction velocity.
B.
The fiber with big diameter always conduct faster.
C.
The increase of extracellular K+ will increse the conduction velocity
D.
Myelination of nerve fiber always decreases the conduciton velocity.
E.
Anesthesia do not influence the conduction velocity.
【简答题】女子月经期的体育卫生要求
【单选题】Which one is correct about the AP conduction velocity of nerve fiber
A.
The fiber with big diameter always conduct faster.
B.
The increase of extracellular K+ will increse the conduction velocity
C.
Myelination of nerve fiber always decreases the conduciton velocity.
D.
Increase of the temperature within physiological limit will increase the conduction velocity.
E.
Anesthesia do not influence the conduction velocity.
【多选题】The factors that influence the AP conduction velocity on nerve fiber include
A.
thickness of the myelin shealth.
B.
myelinated or not
C.
diameter of the fiber
D.
temperature
E.
strength of the stimulation
【单选题】In the sciatic nerve - sartorius experiments, the fatigue of muscle contraction after successive stimulation of nerve fiber is caused by
A.
the inhibition of the signal transmission at neuro-muscle junction.
B.
the decrease of the action potential amplitude.
C.
the decreae of the speed action potential propagates on the nerve fiber.
D.
the low excitability of the muscle.
E.
the decreased efficiency of the signal transmission at triad of the sarcolemma.
【单选题】which one has no direct relation with conduction velocity of the nerve fiber
A.
temperature
B.
myelin sheath
C.
nerve impulse
D.
the length of nerve fiber
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