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Which of the following are the major parts of the nervous system?

Rationale

The Peripheral Nervous System (PNS) and Central Nervous System (CNS) are the major parts of the nervous system.

The nervous system is primarily divided into two parts: the PNS, which includes all nerves outside the brain and spinal cord, and the CNS, which includes the brain and the spinal cord. These two parts work in coordination to regulate and control all the functions of the body.

A (PNS and Somatic Nervous System) YOUR ANSWER

The Somatic Nervous System is a component of the PNS itself and not a separate major part of the nervous system. It is responsible for voluntary movements and the reception of external stimuli. Therefore, this choice is incorrect because it fails to include the CNS, which is a crucial part of the nervous system.

B (Autonomic Nervous System and CNS) YOUR ANSWER

The Autonomic Nervous System, like the Somatic Nervous System, is a part of the PNS. It controls the involuntary functions of the body. Although the CNS is correctly identified in this choice, the PNS is incorrectly replaced by one of its components, making this choice incorrect.

C (PNS and CNS) CORRECT

This is the correct answer. The PNS and CNS are the two main components of the nervous system. The CNS consists of the brain and spinal cord and is responsible for integrating sensory information and responding accordingly. The PNS, on the other hand, consists of all the nerves outside the CNS and is responsible for connecting the CNS to the limbs and organs.

D (Autonomic Nervous System and Somatic Nervous System) YOUR ANSWER

Both the Autonomic and Somatic Nervous Systems are sub-components of the PNS. They are not separate major parts of the nervous system. This choice is incorrect as it fails to recognize the CNS and the overall structure of the PNS.

Conclusion

The major parts of the nervous system are the PNS and the CNS. The PNS connects the CNS to the rest of the body, allowing for communication and response to internal and external stimuli. The CNS, composed of the brain and spinal cord, processes this information and coordinates activity throughout the body. The Autonomic and Somatic Nervous Systems are important components of the PNS, but they are not separate major parts of the nervous system.

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