Pearson eText Human Anatomy & Physiology -- Instant Access (Pearson+)
Pearson eText Human Anatomy & Physiology -- Instant Access (Pearson+)
2nd Edition
ISBN: 9780136873822
Author: Erin Amerman
Publisher: PEARSON+
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Chapter 13, Problem 1CYR

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

a. The somatic sensory division of the PNS detects sensory stimuli from the organs in the thoracic and abdominopelvic cavities.

b. The somatic motor division of the PNS consists of lower motor neurons that directly innervate skeletal muscle fibers.

c. The visceral motor division is also known as the autonomic nervous system and maintains homeostasis of many physiological variables.

d. The term nerve is the equivalent of the term neuron.

e. There are 31 pairs of spinal nerves and 12 pairs of cranial nerves.

Expert Solution & Answer
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Summary Introduction

To review:

Whether the following statements are true or false:

1. The somatic sensory division of the PNS detects sensory stimuli from the organs in the thoracic and abdominopelvic cavities.

2. The somatic motor division of the PNS consists of lower motor neurons that directly innervate the skeletal muscle fibers.

3. The visceral motor division is also known as the autonomic nervous system and maintains homeostasis of many physiological variables.

4. The term ‘nerve’ is the equivalent of the term ‘neuron’.

5. There are 31 pairs of spinal nerves and 12 pairs of cranial nerves.

Introduction:

The peripheral nervous system acts as a link which bridges the CNS (central nervous system) with the body and outer environment. In order to link them, it first detects the sensory parts of the stimuli and carries them to the CNS as a sensory input. The CNS works on the input and then distributes the impulses by means of the PNS (peripheral nervous system) to the effectors to generate a motor output. In this case, the effectors are the muscle cells and glands.

Explanation of Solution

a. The statement “The somatic sensory division of the PNS detects sensory stimuli from the organs in the thoracic and abdominopelvic cavities”is false. The correct statement is the somatic sensory division of the PNS detects sensory stimuli from the structures of musculoskeletal system. In fact, they detect the stimuli from the skin and structures of the musculoskeletal system.

b. The statement “The somatic motor division of the PNS consists of lower motor neurons that directly innervate skeletal muscle fibers” is true. In the true sense, the somatic motor division of the PNS consists ofa lower type of motor neurons which are in direct contact with the skeletal muscle fibers.

c. The statement “The visceral motor division is also known as the autonomic nervous systemwhichmaintains homeostasis of many physiological variables” is true. The visceral motor division is also known as the autonomic nervous system which maintains the homeostasis state of many variables which are physiological in nature by controlling the involuntary motor functions of the body.

d. The statement “The term nerve is the equivalent of the term neuron” is true. It is foundthat a nerve contains numerous neurons which are connected to each other by a tissue.

e. The statement “There are 31 pairs of spinal nerves and 12 pairs of cranial nerves” is true. It widely known that there are 31pairs of spinal nerves and 12 pairs of spinal nerves in the human body.

Conclusion

Thus, it can be concluded that the statements(b), (c),(d) and(e) are true according to the reasons provided and the statement (a) is false.

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Chapter 13 Solutions

Pearson eText Human Anatomy & Physiology -- Instant Access (Pearson+)

Ch. 13.2 - 3. What are the Roman numerals and main...Ch. 13.2 - List the 12 pairs of cranial nerves in ascending...Ch. 13.2 - Prob. 5QCCh. 13.3 - Prob. 1QCCh. 13.3 - What are the anterior and posterior rami, and what...Ch. 13.3 - 3. What are the key structures supplied by each...Ch. 13.3 - 4. Differentiate between the trunks and cords of...Ch. 13.3 - Prob. 5QCCh. 13.3 - Prob. 6QCCh. 13.3 - Prob. 7QCCh. 13.4 - 1. What is sensory transduction? Ch. 13.4 - Prob. 2QCCh. 13.4 - 3. What are the three components of a typical...Ch. 13.4 - What is a first-order sensory neurons receptive...Ch. 13.4 - What is the two-point discrimination threshold,...Ch. 13.4 - What is a dermatome?Ch. 13.4 - 7. Why is visceral pain often perceived as...Ch. 13.5 - 1. What are the main differences between an upper...Ch. 13.5 - 2. What is a motor neuron pool? Ch. 13.5 - What is the general sequence of events for...Ch. 13.6 - Prob. 1QCCh. 13.6 - 2. How do intrafusal and extrafusal muscle fibers...Ch. 13.6 - What are the functions of primary and secondary...Ch. 13.6 - 4. How do Golgi tendon organs and muscle spindles...Ch. 13.6 - How do polysynaptic and monosynaptic reflex arcs...Ch. 13.6 - Prob. 6QCCh. 13.6 - How are the flexion and crossed-extension reflexes...Ch. 13.6 - What are some potential effects of sensory...Ch. 13.6 - How do upper and lower motor neuron disorders...Ch. 13 - Mark the following statements as true or false. If...Ch. 13 - Prob. 2CYRCh. 13 - 3. Define each of the following terms in your own...Ch. 13 - First, write the Roman numeral that corresponds to...Ch. 13 - Prob. 5CYRCh. 13 - Match the following nerves with the structures...Ch. 13 - First-order somatic sensory neurons are...Ch. 13 - Prob. 8CYRCh. 13 - Prob. 9CYRCh. 13 - 10. Merkel cell fibers, tactile corpuscles,...Ch. 13 - 11. Place the following sequence of events for the...Ch. 13 - How do upper and lower motor neurons differ?Ch. 13 - 13. List and describe the basic steps involved in...Ch. 13 - 14. The lower motor neurons that innervate...Ch. 13 - Fill in the blanks:______ detect the degree to...Ch. 13 - Which of the following is the correct order of...Ch. 13 - 17. Mark the following statements as true or...Ch. 13 - Prob. 18CYRCh. 13 - Prob. 1CYUCh. 13 - Prob. 2CYUCh. 13 - Prob. 3CYUCh. 13 - Prob. 1AYKACh. 13 - Jason presents for evaluation after a severe...Ch. 13 - 3. When Mr. Williams goes to the emergency...Ch. 13 - 4. Maria is a 3-year-old who has been diagnosed...Ch. 13 - Another feature of CIPA is anhidrosis, or the...
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