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【简答题】
水封洞库中水平水幕的作用是什么?
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参考解析：
知识点：
皮皮学刷刷变学霸
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】The α motor neuron at the anerior horn of the spinal cord is the of the movement reflex.
A.
effector
B.
motor nuit
C.
final common pathway
D.
sensory receptor
E.
center
【单选题】Each motor neuron synapses on several muscle fibers, forming( ).
A.
nervous system
B.
a motor unit
C.
horn cell
【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】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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