NEET Biology Neural Control and Coordination Questions
Neural Control and Coordination practice focused on neurons, impulse transmission, central nervous system, reflexes and sensory systems. Every preview below comes from NeetVellum's live original bank—not an unverified PYQ reconstruction.
neurons, impulse transmission, central nervous system, reflexes and sensory systems.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 1 · difficulty 1/5
The resting membrane potential of a neuron is actively maintained by the sodium–potassium pump operating across the axolemma. The ratio in which this pump transports Na⁺ outwards to K⁺ inwards is:
A. 2 Na⁺ outwards : 3 K⁺ inwards
B. 1 Na⁺ outwards : 1 K⁺ inwards
C. 3 Na⁺ outwards : 2 K⁺ inwards
D. 3 K⁺ outwards : 2 Na⁺ inwards
Example 2 · difficulty 1/5
In a myelinated nerve fibre, the nerve impulse appears to leap from one point to the next along the axon. This saltatory conduction is possible because the voltage-gated ion channels are concentrated at the:
A. nodes of Ranvier
B. myelin sheath secreted by Schwann cells
C. synaptic knobs at the axon terminals
D. entire axolemma uniformly, as in unmyelinated fibres
Example 3 · difficulty 3/5
At a chemical synapse, impulse transmission involves a definite order of events: (i) neurotransmitter binds to receptors on the post-synaptic membrane, (ii) Ca²⁺ channels of the synaptic knob open and Ca²⁺ flows in, (iii) synaptic vesicles fuse with the pre-synaptic membrane and release the transmitter into the cleft, (iv) an action potential arrives at the axon terminal. The correct sequence is:
A. ii → iv → i → iii
B. iv → ii → iii → i
C. iv → iii → ii → i
D. i → ii → iv → iii
The evidence-first practice loop
1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.