Textbook Question
A spinal nerve divides into a(n)_____ that serves the anterior side of the body and the limbs and a(n)_____that serves the posterior side of the body.
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Ch. 13 The Peripheral Nervous System
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology26
- Ch. 2 The Chemistry of Life38
- Ch. 3 The Cell55
- Ch. 4 Histology47
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System36
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System42
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart30
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity45
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Chapter 13, Problem 1b
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
b. The somatic motor division of the PNS consists of lower motor neurons that directly innervate skeletal muscle fibers.
Verified step by step guidance1
Step 1: Understand the somatic motor division of the peripheral nervous system (PNS). The somatic motor division is responsible for voluntary control of skeletal muscles and consists of lower motor neurons that directly innervate skeletal muscle fibers.
Step 2: Analyze the statement provided. The statement claims that the somatic motor division of the PNS consists of lower motor neurons that directly innervate skeletal muscle fibers.
Step 3: Determine if the statement is true or false. Based on the definition of the somatic motor division, the statement is true because lower motor neurons are indeed responsible for directly innervating skeletal muscle fibers.
Step 4: If the statement were false, you would need to correct it. For example, if the statement incorrectly mentioned that the somatic motor division innervates smooth muscle fibers, you would correct it to specify skeletal muscle fibers instead.
Step 5: Conclude that the statement is true as written, and no corrections are necessary.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Somatic Motor Division
The somatic motor division is a part of the peripheral nervous system (PNS) responsible for voluntary movements. It consists of lower motor neurons that transmit signals from the central nervous system to skeletal muscles, enabling conscious control of muscle contractions.
Recommended video:
09:40
Introduction to Cell Division
Lower Motor Neurons
Lower motor neurons are the final pathway for transmitting motor signals from the spinal cord or brainstem to skeletal muscles. They directly innervate muscle fibers, facilitating movement by causing muscle contraction in response to neural impulses.
Recommended video:
Guided course
04:20The Neuron
Innervation
Innervation refers to the supply of nerves to a specific body part, allowing for communication between the nervous system and muscles or organs. In the context of the somatic motor division, it specifically involves the connection between lower motor neurons and skeletal muscle fibers, enabling voluntary movement.
Recommended video:
Guided course
02:35Characteristic 3: Avascular but Innervated
Related Practice
Textbook Question
Merkel cell fibers, tactile corpuscles, Ruffini endings, and lamellated corpuscles are all types of:
a. Nociceptors
b. Mechanoreceptors
c. Photoreceptors
d. Chemoreceptors
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Textbook Question
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.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
e. There are 31 pairs of spinal nerves and 12 pairs of cranial nerves.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
d. The term nerve is the equivalent of the term neuron.
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