Question

A mixed nerve is one which
A. Carries sensations from 2 or more different sense organs.
B. Contains both sensory and motor fibres.
C. Has a common root but branches into two or more nerves to different organs.
D. Has two or more roots from different parts of the brain.

Answer 1

The mixed nerves are the nerves that function bidirectional carrying the message from the tissue or organ to the central nervous system and back from central nervous system to the effector organ or tissue.

Complete step by step answer: The nervous system of the body is the system which controls and coordinates the activity of the organisms.it controls the behaviour, perceptions, memories and all the voluntary actions of our body.
It is divided into two parts:
Central nervous system which include: brain and spinal cord
Peripheral nervous system which include: nerves and sensory receptors.
Now we will discuss the Peripheral nervous system because our concern is with nerves.
Peripheral nervous system includes two main nerves:
Efferent nerves: carry instruction from central nervous system to the effector organ where the nerve is ending.it is also known as motor nerves.
Different nerves: carry the instruction from the various tissues and organs to the Central nervous system. It is also known as sensory nerves.
Spinal cord of our body is our support system extending from the base of the brain to the tail region. The vertebral column of the human body consists of 31 vertebrae, from which arises 31-spinal nerves to the various organs and sites of our body. The spinal nerves are mixed in nature that means they perform the function to carry the message from the tissue or organ to brain and from brain to tissue and organs back.
Thus the correct option is B, mixed nerves are the ones that contain both sensory and motor fibres.

Note: The nerves are the important part of our body if any nerve gets damaged the message transportation will not be able to continue and that particular part will be damaged and will not be able to work any further.