Introduction:
The voluntary movements of the body are performed with the help of skeletal muscle. These voluntary actions are associated with the peripheral nervous system. The somatic nervous system comprises of afferent and efferent nerves also it is a part of the peripheral nervous system.
Answer to Problem 1MC
Correct answer:
The somatic nervous system is responsible for voluntary activity and it works in conjugation with the sensory nervous system.
Explanation of Solution
Justification for the correct answer:
Option (b) is given that it is responsible for the voluntary activity. It is a known fact that the somatic nervous system falls under the peripheral nervous system which is associated with controlling the voluntary movements of the body. Hence, option (b) is correct.
Option (d) is given that it works in conjugation with the sensory nervous system. It has already been said that the somatic nervous system comprises of afferent nerves also known as sensory nerves. Therefore, both the system works with the support of each other. Hence, option (d) is correct.
Justification for the incorrect answers:
Option (a) is given that it carries information into the central nervous system. The somatic nervous system comprises of-
a) Afferent nerves- These are the sensory nerves which are responsible for carrying information such as sensation from the skin to the central nervous system.
b) Efferent nerves- These are motor nerves which are responsible for carrying out commands from the central nervous to a particular body part. Therefore, the somatic nervous system is responsible for both carrying information into and out of the central nervous system. So, it is an incorrect option.
Option (c) is given that it is divided into parasympathetic and sympathetic branches. The automatic nervous system is associated with the involuntary responses and is divided into sympathetic and parasympathetic nervous system. Therefore, it is the automatic nervous system which is divided into sympathetic and parasympathetic and not the somatic nervous system. So, it is an incorrect option.
Hence, options, (a) and(c) are incorrect.
Thus, it can be concluded that somatic nervous system falls into the category of the peripheral nervous system which is known to control the voluntary movements of the body and this system comprises of afferent and efferent nerves.
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Chapter 7 Solutions
Essentials of Human Anatomy & Physiology (11th Edition)
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