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Motor neuron: Quiz


Question 1:
Where is Motor neuron?
North East
Ventral horn of the spinal cord

Question 2: The motor neuron is often associated with efferent neuron, primary neuron, or ________.
Grey matterWhite matterAlpha motor neuronNervous system

Question 3: This is why muscle relaxants work by acting on the motoneurons that innervate muscles (by decreasing their ________ activity) or on cholinergic neuromuscular junctions, rather than on the muscles themselves.
Action potentialElectrophysiologyNeuroscienceBrain

Question 4: In vertebrates, the term motor neuron (or motoneuron) classically applies to neurons located in the central nervous system (or CNS) that project their ________ outside the CNS and directly or indirectly control muscles.
AxonSoma (biology)Alpha motor neuronSchwann cell

Question 5: Somatic motor neurons, which directly innervate ________, involved in locomotion (such as muscles of the limbs, abdominal, and intercostal muscles).
Cardiac muscleSkeletal muscleExtrafusal muscle fiberIntrafusal muscle fiber

Question 6: the command of ________ is disynaptic (involving two neurons: the “general visceral motor neuron” located in the CNS, which synapses onto a ganglionic neuron, located in the PNS, which synapses onto the muscle).
Smooth muscleIntrafusal muscle fiberCardiac muscleSkeletal muscle

Question 7: ________ (axon hillock, axon terminals, axoplasm, axolemma, neurofibril/neurofilament)
Nervous systemSchwann cellAxonNeuron

Question 8: It could be argued that, in the command of visceral muscles, the ganglionic neuron — ________ or sympathetic — is the real “motor neuron”, being the one that directly innervates the muscle (whereas the “general visceral motor neuron” is, strictly speaking, a “preganglionic” neuron).
Autonomic nervous systemSympathetic nervous systemParasympathetic nervous systemNerve

Question 9: Special visceral motor neurons — also called “branchial motor neurons”— which directly innervate branchial muscles (that motorize the ________ in fish and the face and neck in land vertebrates).
GillSwim bladderFish anatomyDemersal fish


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