NEET Biology: Neural Control and Coordination Practice Questions
14 free multiple-choice questions on Neural Control and Coordination for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more Neural Control and Coordination questions in the app →Q1. The insulation layer covering the axon of a neuron is known as the myelin sheath. What is the main function of this sheath?
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Correct answer: B — To increase the rate of nerve impulse conduction
The myelin sheath acts as an insulating layer, which significantly increases the speed and efficiency of nerve impulse transmission (conduction).
Q2. Nerve fibers that transmit signals from sensory receptors towards the spinal cord are classified as:
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Correct answer: A — Sensory neurons
Sensory neurons (afferent neurons) carry information from sensory organs to the central nervous system.
Q3. What is the primary role of the myelin sheath in nerve impulse conduction?
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Correct answer: A — To speed up the transmission of the impulse
The myelin sheath acts as an electrical insulator, allowing the nerve impulse to jump between the Nodes of Ranvier, thus greatly increasing the speed of conduction (saltatory conduction).
Q4. Which part of the human nervous system is primarily responsible for coordinating voluntary actions and higher brain functions?
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Correct answer: A — Cerebrum
The Cerebrum is the largest part of the brain and is responsible for higher functions like thought, memory, voluntary movement, and sensory processing.
Q5. Which division of the Peripheral Nervous System (PNS) is primarily responsible for transmitting sensory information from the sensory receptors in the body to the Central Nervous System (CNS)?
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Correct answer: D — Sensory Division
The Sensory Division of the PNS is dedicated to collecting information about the internal and external environment via sensory receptors and transmitting this information to the CNS.
Q6. Which division of the Autonomic Nervous System prepares the body for 'fight or flight' response?
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Correct answer: C — Sympathetic Nervous System
The Sympathetic Nervous System is responsible for the 'fight or flight' response, increasing heart rate and blood pressure.
Q7. The resting membrane potential of a neuron is maintained primarily by the differential concentration of which ions across the cell membrane?
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Correct answer: A — Potassium and Sodium
The resting potential is mainly established by the high concentration of Potassium ions (K+) inside the cell and the high concentration of Sodium ions (Na+) outside the cell, driven by the Na+/K+ pump.
Q8. The signals that relay commands from the brain to the effector organs (muscles and glands) are typically carried by which type of nerve fibers?
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Correct answer: D — Motor fibers
Motor fibers (efferent neurons) carry signals away from the CNS to the muscles and glands, initiating a response.
Q9. Which part of the nervous system is responsible for transmitting signals between the brain and the rest of the body?
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Correct answer: B — Central Nervous System (CNS)
The Central Nervous System (CNS), which includes the brain and spinal cord, is responsible for processing information, while the Peripheral Nervous System (PNS) transmits signals to and from the CNS.
Q10. During nerve impulse conduction, the impulse travels along the axon in a direction that is typically from which end to which end?
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Correct answer: B — Axon to Axon
The nerve impulse is generated at the cell body (soma) and conducted along the axon toward the terminal end (axon terminal) for signal transmission.
Q11. The division of the nervous system into Central Nervous System (CNS) and Peripheral Nervous System (PNS) is based on the location of the nervous tissue. Which structure primarily constitutes the CNS?
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Correct answer: A — Brain and spinal cord
The CNS is composed of the brain and the spinal cord, which are the main components of the central nervous system.
Q12. The major tract responsible for carrying motor commands from the brain to the spinal cord is primarily associated with which pathway?
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Correct answer: A — Descending pathways
Descending motor pathways originate in the brain and carry signals for movement commands down to the spinal cord, initiating motor actions.
Q13. The reflex arc involves which three main components in sequence?
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Correct answer: D — Receptor, Spinal Cord, Effector
A reflex arc consists of a receptor (stimulus detection), a sensory neuron, an interneuron (in the spinal cord), and a motor neuron leading to the effector (muscle/gland).
Q14. The peripheral nervous system (PNS) is broadly divided into two main parts. What structures primarily constitute the PNS?
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Correct answer: A — Sensory neurons and motor neurons
The peripheral nervous system (PNS) is composed of all nerves outside the brain and spinal cord. It is fundamentally made up of sensory neurons (carrying input) and motor neurons (carrying output).
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