Textbook Question
Predict what might happen if nociceptors were rapidly adapting instead of slowly adapting receptors. Would this change be beneficial or potentially harmful?
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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 2
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.
Verified step by step guidance1
Understand the anatomy of a spinal nerve: Spinal nerves are mixed nerves that carry both sensory and motor information. They emerge from the spinal cord and divide into branches called rami.
Identify the two main branches of a spinal nerve: The spinal nerve divides into the anterior (ventral) ramus and the posterior (dorsal) ramus.
Learn the function of the anterior (ventral) ramus: The anterior ramus serves the anterior side of the body, including the limbs, and is involved in forming nerve plexuses such as the brachial and lumbar plexuses.
Learn the function of the posterior (dorsal) ramus: The posterior ramus serves the posterior side of the body, including the muscles and skin of the back.
Apply this knowledge to the problem: The blank spaces in the question correspond to the anterior (ventral) ramus for the anterior side of the body and limbs, and the posterior (dorsal) ramus for the posterior side of the body.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Spinal Nerve Anatomy
Spinal nerves are part of the peripheral nervous system and emerge from the spinal cord. Each spinal nerve is formed by the fusion of a dorsal (posterior) root and a ventral (anterior) root. The ventral root carries motor information from the spinal cord to the muscles, while the dorsal root carries sensory information from the body to the spinal cord.
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Ventral and Dorsal Roots
The ventral root of a spinal nerve is responsible for transmitting motor signals to the anterior side of the body and limbs, facilitating movement. In contrast, the dorsal root transmits sensory signals from the posterior side of the body, allowing for the perception of sensations such as touch, pain, and temperature. Understanding the functions of these roots is crucial for comprehending how the nervous system controls and processes bodily functions.
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Anterior and Posterior Body Regions
In anatomical terms, the anterior (or ventral) side refers to the front of the body, including the chest and abdomen, while the posterior (or dorsal) side refers to the back. This distinction is important in understanding how different parts of the nervous system interact with specific body regions, influencing both voluntary movements and sensory experiences.
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Related Practice
Textbook Question
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.
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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.
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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Textbook Question
Explain why you lose both motor and sensory function of a part of your body when a spinal nerve is numbed with anesthetic agents.
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Textbook Question
Devise a series of physical examination tests that assess the function of each of the cranial nerves.
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