2 / 20
Which of the following statements correctly summarises the basic functions of the Central Nervous System (CNS), Peripheral Nervous System (PNS) and the Autonomic Nervous System (ANS)?
  • A
    The CNS connects the brain to the rest of the body. The PNS is responsible for the internal organs. The ANS governs the voluntary control of internal organs.
  • B
    The CNS integrates all parts of the body. The PNS connects the brain via the spinal cord to all internal organs. The ANS is responsible for organ and muscle control.
  • C
    The CNS consists of the brain and spinal cord. The PNS provides the connection to the limbs and organs. The ANS governs the involuntary function of internal organs.
  • D
    The CNS serves as the main processing unit. The PNS integrates the brain with the rest of the body. The ANS is responsible for muscle control of body movements.

Refer to figure.

THE NERVOUS SYSTEM

The nervous system is comprised of two major parts, or subdivisions, the Central Nervous System (CNS) and the Peripheral Nervous System (PNS). The Central Nervous System (CNS) includes the brain and spinal cord, while the Peripheral Nervous System (PNS) includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs.

The CNS has various centers located within it that carry out the sensory, motor and integration of data.

The PNS is a vast network of spinal and cranial nerves that are linked to the brain and the spinal cord. It contains sensory receptors which help in processing changes in the internal and external environment. This information is sent to the CNS via afferent sensory nerves. The PNS is then subdivided into the Autonomic Nervous System (ANS) and the Somatic Nervous System.

  • The autonomic (ANS) has involuntary control of internal organs, blood vessels, smooth and cardiac muscles. For example, the digestive system is controlled involuntarily as it moves food throughout the stomach and intestines;
  • The somatic (SNS) has voluntary control of skin, bones, joints, and skeletal muscle. The two systems function together, by way of nerves from the PNS entering and becoming part of the CNS, and vice versa.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • United Kingdom
    9
  • Austro Control
    6
  • Hong Kong
    4
  • Pakistan
    3
  • Greece
    1
  • Hungary
    1
  • Poland
    1
Keyboard Shortcut Use Keyboard Shortcuts