皮皮学，免费搜题
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搜题
【多选题】
超额利润 来自:A.
供求关系
B.
创新
C.
承担风险
D.
垄断
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反馈参考答案：
举一反三
【单选题】A motor neuron
A.
is found only in the brain
B.
carries information toward the CNS
C.
carries impulses to a muscle
D.
carries information away from the CNS
【单选题】excitation of γ motor neuron will induce
A.
contraction of extrafusal fiber
B.
relaxation of intrafusal fiber
C.
increase of the sensitity of the sensory receptors in muscle spindle.
D.
decrease of impulse on Ia afferent fiber.
E.
decrease of the impulses of the α motor neuron.
【单选题】Which description is correct about the α motor neuron in anterior horn of the spinal cord.
A.
final common pathway of the reflexive control of skeletal muscle contracton.
B.
big α motor neuron compose the big motor unit.
C.
small α motor neuron compose the smallmotor unit.
D.
release glutamate at the presynaptic terminal.
E.
firing at a relative high frequency.
【单选题】excitation of γ motor neuron will induce
A.
increase of the sensitity of the sensory receptors in muscle spindle.
B.
contraction of extrafusal fiber
C.
relaxation of intrafusal fiber
D.
decrease of impulse on Ia afferent fiber.
E.
decrease of the impulses of the α motor neuron.
【单选题】Which description is right about the gama motor neuron in the anterior horn of the spinal cord
A.
innervate the extrafugal fiber.
B.
release glycine at the axon terminal.
C.
low sensitivity comparted with α motor neuron.
D.
antagonist of the α motor neuron
E.
regulate the sensitivity of the muscle spindle.
【单选题】Which description is right about the gama motor neuron in the anterior horn of the spinal cord
A.
regulate the sensitivity of the muscle spindle.
B.
innervate the extrafugal fiber.
C.
release glycine at the axon terminal.
D.
low sensitivity comparted with α motor neuron.
E.
antagonist of the α motor neuron
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