Chapter 33, Problem 1TY

Summary Introduction

Introduction:

The nervous system is defined as the network of neurons spread throughout the body and

conducts the signals between different body parts. It is majorly divided into the central nervous

system and peripheral nervous system. The coordination between the two mediates different

functions performed by the body.

Answer to Problem 1TY

The correct answer is option (c) the central nervous system.

Explanation of Solution

Explanation/justification for the correct answer:

Option (c) the central nervous system. The central nervous system is mainly involved in controlling functions like movements, awareness, thoughts, sensations, memory, and speech. It consists of the brain and the spinal cord which are involved in the processing of sensory inputs and sends motor signals. Hence, this option is correct.

Explanation for incorrect answer:

Option (a) the peripheral nervous system. The Peripheral nervous system has a network of nerves present all over the body and connects to the CNS. Thus, it does not constitute the brain and the spinal cord. Hence, this option is incorrect.

Option (b) the efferent division of the nervous system. The efferent division connects the central nervous system to the effector system and thus allows the CNS to control various responses. Hence, this option is incorrect.

Option (d) autonomic nervous system. It is a division of the peripheral nervous system and regulates digestion, sexual arousal, respiration, blood pressure, and heart rate. Thus, it does not constitute the brain and the spinal cord. Hence, this option is incorrect.

Option (e) the central and peripheral nervous system. The CNS and the PNS are the two major divisions of the nervous system but the brain and the spinal cord are part of the central nervous system only. Hence, this option is incorrect.