The afferent fibers of stretch reflex are ()
A. Ⅰa and Ⅱ
B. Ⅰb and Ⅱ
C. Ⅰand Ⅱa
D. Ⅰa
E. Ⅰb
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What kind of ion permeability increased when the inhibitory postsynaptic potential? ()
A. K+, Cl-, especially K+
B. Ca2+, Cl-, especially Ca2+
C. Na+, Cl-, especially Na+
D. K+, Cl-, especially Cl-
E. K+, Ca2+, especially Ca2+
There is an increase in alpha motor neuron efferent impulse, it can make ()
A. muscle spindle afferent impulse increase
B. extrafusal muscle contract
C. intrafusal muscle contract
D. extrafusal and intrafusal muscle co-contract
E. gamma motor neuron efferent impulse increase
The conduction of excitement on each fiber of nerve trunk doesn’t disturb each other, which is called ()
A. physiological integrity
B. relative infatigability
C. bidirectional conduction
D. insulativity
E. unattenuated conduction
The reason that the patient with poliomyelitis appears limb muscle atrophy is ()
A. muscle damaged by the virus
B. loss of nerve impulse affecting to muscle
C. loss of motor function of muscle
D. loss of trophic action of motor nerve to muscle
E. blood flow decrease due to paralysis of the muscle
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