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The _______________ (C) receives signal from a ________________ (B) and transmits the impulse via a ________________ (D) into the CNS (at the level of spinal cord). The __________________ (E) then carries signals from CNS to the _________________ (F). The _________________ (A) and ________________ (K) thus forms a reflex arc as shown below in the ________________ reflex.

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( a ) afferent neuron; sensory organ; ventral nerve root; efferent neuron; effector; stimulus and response; knee ****
( b ) afferent neuron; sensory organ; dorsal nerve root; efferent neuron; effector; stimulus and response; knee ****
( c ) efferent neuron; sensory organ; ventral nerve root; afferent neuron; effector; stimulus and response; knee ****
( d ) efferent neuron; sensory organ; dorsal nerve root; afferent neuron; effector; stimulus and response; knee ****

1 Answer

(B) is the right answer.

The afferent neuron receives signal from a sensory organ and transmits the impulse via a dorsal nerve root into the CNS (at the level of spinal cord). The efferent nueuron then carries signals from CNS to the effector. The stimulus and response thus forms a reflex arc as shown below in the knee **** reflex.
answered Mar 26, 2014 by pady_1
 

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