Concept explainers
The integrative functions of the nervous system are performed mainly by
- a. afferent neurons.
- b. efferent neurons.
- c. neuroglia.
- d. sensory neurons.
- e. interneurons.

Introduction:
The nervous system is a complex network of nerve cells. Nerves are the basic unit of the nervous system. The nervous system is classified into two major divisions’ central nervous system and peripheral nervous system. The peripheral nervous system is subdivided into sensory division (afferent) and motor division (efferent).
Answer to Problem 1TYR
Correct answer:
The neurons which receives, process and store information in response to stimuli are known as interneurons. These are integrative functions of the peripheral nervous system. Therefore, option e is correct.
Explanation of Solution
Justify reasons for the correct statement:
The neurons which carry out integrative functions of the nervous system are interneurons. These neurons are useful in making decisions. Interneurons constitute about 90% of the nervous system.
Option (e) is given as, “interneurons”.
The integrative functions are carried out by interneurons. Hence, the option (e) is correct.
Justify reasons for the incorrect statements:
Option (a) is given as, “afferent”.
Afferent neurons conduct signal towards the CNS in response to stimuli, such as heat, light, and so on. Hence, it is a wrong answer.
Option (b) is given as, “efferent”.
Efferent neurons or motor neurons sends signal to the gland cells and the muscle cells. Hence, it is a wrong answer.
Option (c) is given as, “neuroglia”.
Neuroglia is neural cells or supportive cells which protects the neurons in central and peripheral nervous system. Hence, it is a wrong answer.
Option (d) is given as, “sensory neurons”.
Sensory neurons are a special type of neurons which convert external stimuli into action potentials. Hence, it is a wrong answer.
Hence, options (a), (b), (c), and (d) are incorrect.
The integrative functions of nervous system are carried out by type of neurons called the interneurons.
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