Control and Coordination — Science STD 10 — Question
CBSE BoardEnglish MediumSTD 10ScienceControl and Coordination1 Mark
MCQ
A reflex arc does not involve :
A
A receptor
B
A sensory pathway
C
A motor pathway
✓
The brain
✓
Answer
Correct option: D.
The brain
A reflex arc is a simple nervous pathway and consists of the sensory receptor, afferent neuron, center, efferent neuron and effector organ.
The afferent/sensory neurons transmit the sensory information from sensory receptors to the spinal cord $($sensory pathway$).$
The interneurons of spinal cord integrate the incoming information and signal is relayed to motor/efferent neurons.
The motor pathway transmits the signal from motor neurons to the effector organs $($muscles and glands etc$).$
Thus, reflex arc transmits the information from receptor to effector via the spinal cord. The brain is not the part of the reflex arc.
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