Question
NEET 2022 (paraphrased): Regarding neural control and coordination, which of the following statements is correct? (a) resting potential refers to receptor → sensory neuron → spinal cord → motor neuron → effector (b) reflex arc is characterised by -70 mV maintained by Na⁺/K⁺ pump (c) neurotransmitter — acetylcholine at neuromuscular junction (d) synapse delay has no role in neural control and coordination
Solution — Step by Step
This option swaps the definitions. resting potential is actually -70 mV maintained by Na⁺/K⁺ pump, not what (a) claims. So (a) is out.
Similarly, reflex arc means receptor → sensory neuron → spinal cord → motor neuron → effector. Option (b) is mismatched. Out.
This one reads correctly: neurotransmitter — acetylcholine at neuromuscular junction. Match with NCERT wording confirms it.
synapse delay — about 0.5 ms per synapse — plays a real role in neural control and coordination, so option (d) is factually wrong.
Correct answer: (c) neurotransmitter — acetylcholine at neuromuscular junction.
Why This Works
NEET PYQs on neural control and coordination rely on definition swapping. The examiner takes two correct facts and pairs them with the wrong terms. If you know each fact cold, the MCQ dissolves in 20 seconds.
Alternative Method
For definition-swap MCQs, don’t read all four options first. Read option (a), decide true/false, then (b), and so on. This prevents confusion between similar-looking options.
NEET reuses the same fact set every 2–3 years with different distractors. Master the four NCERT facts on neural control and coordination listed here and you’ll handle almost any MCQ on this chapter.
Common Mistake
Students second-guess themselves when they see a familiar option listed as “wrong” in the stem. Trust the elimination — if you know the definition, stick with it.
Keep a one-page sheet of definitions for every NEET chapter. Revise only that sheet in the last 48 hours before the exam.