Consider the following regarding the divisions of the human neural system: 1. Central neural system includes only the brain. 2. Peripheral neural system comprises all nerves associated with the CNS. 3. Central neural system is the primary site for information processing and control. Which of the statements given above are correct?

Correct Option The correct option is 2 and 3 only. Explanation The human neural system is structurally and functionally divided into two main components: the Central Neural System (CNS) and the Peripheral Neural System (PNS). These systems collaborate to receive sensory input, process information, and execute motor responses. Statement-wise Analysis - Statement 1 is Incorrect: The Central Neural System (CNS) does not consist of the brain alone. It comprises both the brain and the spinal cord. Together, these structures form the main axis of the body's nervous system. - Statement 2 is Correct: The Peripheral Neural System (PNS) comprises all the nerves of the body associated with the CNS. This includes cranial nerves (originating from the brain) and spinal nerves (originating from the spinal cord), which connect the CNS to peripheral tissues and organs. - Statement 3 is Correct: The CNS acts as the command center of the body. It is the primary site for information processing and control, where sensory data is integrated and motor commands are generated. Key Takeaway: The CNS (Brain + Spinal Cord) is the processing unit, whereas the PNS serves as the communication network (via afferent and efferent fibers) connecting the CNS to the rest of the body.

NCERT Class 11 Science — Chapter 8: Neural Control and Coordination

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Consider the following regarding the divisions of the human neural system:

Central neural system includes only the brain.
Peripheral neural system comprises all nerves associated with the CNS.
Central neural system is the primary site for information processing and control.

Which of the statements given above are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A1, 2 and 3
B2 only
C1 and 2 only
D2 and 3 only

Did you get this right?

Solution

Correct Option

The correct option is 2 and 3 only.

Explanation

The human neural system is structurally and functionally divided into two main components: the Central Neural System (CNS) and the Peripheral Neural System (PNS). These systems collaborate to receive sensory input, process information, and execute motor responses.

Statement-wise Analysis

Statement 1 is Incorrect: The Central Neural System (CNS) does not consist of the brain alone. It comprises both the brain and the spinal cord. Together, these structures form the main axis of the body's nervous system.
Statement 2 is Correct: The Peripheral Neural System (PNS) comprises all the nerves of the body associated with the CNS. This includes cranial nerves (originating from the brain) and spinal nerves (originating from the spinal cord), which connect the CNS to peripheral tissues and organs.
Statement 3 is Correct: The CNS acts as the command center of the body. It is the primary site for information processing and control, where sensory data is integrated and motor commands are generated.

Key Takeaway: The CNS (Brain + Spinal Cord) is the processing unit, whereas the PNS serves as the communication network (via afferent and efferent fibers) connecting the CNS to the rest of the body.

Your note

More from Chapter 8: Neural Control and Coordination

With reference to coordination in the human body, consider the following statements: 1. Neural pathways enable rapid point-to-point signalling. 2. Hormones provide electrical integration across organs. 3. Both systems jointly ensure synchronised organ function. Which of the statements given above are correct?

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Consider the following statements about synapses: 1. Electrical synapses transmit faster than chemical synapses. 2. Chemical synapses have closely apposed membranes with no cleft. 3. Electrical synapses are rare in humans. Which of the statements given above are correct?

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Assertion (A): Impulse transmission across an electrical synapse is very similar to impulse conduction along a single axon. Reason (R): At electrical synapses, the membranes of the pre- and post-synaptic neurons are in very close proximity, allowing current to flow directly.

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Consider the following statements: 1. The cerebral cortex contains only motor areas. 2. Association areas are responsible for intersensory associations, memory and communication. 3. Sensory areas are present in the cortex. Which of the statements given above are correct?

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Assertion (A): In a resting neuron, the axonal membrane is positively charged outside and negatively charged inside. Reason (R): The sodium-potassium pump transports 3 Na+ into the cell for every 2 K+ transported out.

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Correct Option

The correct option is 2 and 3 only.

Explanation

Statement-wise Analysis

Statement 1 is Incorrect: The Central Neural System (CNS) does not consist of the brain alone. It comprises both the brain and the spinal cord. Together, these structures form the main axis of the body's nervous system.
Statement 2 is Correct: The Peripheral Neural System (PNS) comprises all the nerves of the body associated with the CNS. This includes cranial nerves (originating from the brain) and spinal nerves (originating from the spinal cord), which connect the CNS to peripheral tissues and organs.
Statement 3 is Correct: The CNS acts as the command center of the body. It is the primary site for information processing and control, where sensory data is integrated and motor commands are generated.