Neuron & Nervous System — NEET Biology MCQs with Solutions
Free NEET Biology Neuron & Nervous System MCQs with step-by-step solutions (6 questions). Part of Neural Control and Coordination. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Neuron & Nervous System · easy · theory
The structural and functional unit of the nervous system is the:
A. Sarcomere
B. Neuron ✓ Correct
C. Nephron
D. Alveolus
Solution: The neuron (nerve cell) is the basic unit that conducts nerve impulses.
Q2 — Neuron & Nervous System · easy · theory
The part of a neuron that receives impulses and carries them toward the cell body is the:
A. Dendrite ✓ Correct
B. Myelin sheath
C. Synapse
D. Axon
Solution: Dendrites receive signals and carry them toward the cell body; the axon carries impulses away.
Q3 — Neuron & Nervous System · medium · theory
The human nervous system is divided into the central nervous system (CNS) and the:
A. Digestive system
B. Circulatory system
C. Peripheral nervous system (PNS) ✓ Correct
D. Endocrine system
Solution: CNS = brain + spinal cord; PNS = the nerves connecting the CNS to the body.
Q4 — Neuron & Nervous System · medium · theory
The fatty insulating layer around some axons that speeds up impulse conduction is the:
A. Synaptic cleft
B. Myelin sheath ✓ Correct
C. Neurilemma only
D. Sarcolemma
Solution: The myelin sheath insulates the axon; impulses "jump" between nodes of Ranvier (saltatory conduction), speeding transmission.
Q5 — Neuron & Nervous System · hard · theory
The autonomic nervous system is divided into two antagonistic parts:
A. Motor and sensory
B. Cranial and spinal
C. Sympathetic and parasympathetic ✓ Correct
D. Somatic and central
Solution: The ANS has the sympathetic ("fight or flight") and parasympathetic ("rest and digest") divisions.
Q6 — Neuron & Nervous System · hard · theory
Conduction of a nerve impulse is faster in a myelinated fibre because:
A. The impulse jumps from node to node (saltatory conduction) ✓ Correct
B. The axon is thinner
C. There is no membrane potential
D. The neurotransmitter travels faster
Solution: In myelinated axons, the impulse leaps between nodes of Ranvier, making conduction much faster than in unmyelinated fibres.