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Questions and Answers
Which of the following functions is NOT directly influenced by the autonomic nervous system?
Which of the following functions is NOT directly influenced by the autonomic nervous system?
Which organ system is responsible for GI motility and secretion?
Which organ system is responsible for GI motility and secretion?
Which of the following is a consequence of increased autonomic nervous system activity?
Which of the following is a consequence of increased autonomic nervous system activity?
What role does the autonomic nervous system play in urinary bladder emptying?
What role does the autonomic nervous system play in urinary bladder emptying?
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Which of the following bodily functions is managed by the autonomic nervous system?
Which of the following bodily functions is managed by the autonomic nervous system?
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Study Notes
Autonomic Nervous System
- The autonomic nervous system (ANS) is responsible for regulating involuntary bodily functions.
- The ANS is divided into two main branches: the sympathetic nervous system and the parasympathetic nervous system.
Functional Anatomy of the ANS
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Autonomic Nerve Pathway:
- Extends from the central nervous system (CNS) to target organs.
- Consists of two-neuron chains:
- Preganglionic Fiber: Connects to the cell body of the second neuron in the chain.
- Postganglionic Fiber: Innervates the effector organ.
Sympathetic Nervous System
- Sympathetic nerve fibers originate in the spinal cord between T1 and L2/L3 (thoracolumbar region).
- The preganglionic fibers originate from nuclei of cranial nerves (CN) III, VII, IX, and X or from sacral spinal segments S2-S4.
- Sympathetic nervous system actions tend to be localized.
- It has an anabolic action, conserving body stores.
- Increases gastrointestinal secretion and motility (secretomotor).
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Description
Explore the intricacies of the Autonomic Nervous System (ANS) with this quiz. Learn about its two main branches, the sympathetic and parasympathetic nervous systems, and their roles in regulating involuntary bodily functions. Test your understanding of nerve pathways and the functional anatomy of the ANS.
