Questions and Answers
What do sensory neurons do?
What lies in the CNS and processes information?
Interneurons
What do motor neurons carry?
Messages away from CNS
What are the functional classifications of neurons?
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Which of the following are divisions of the nervous system?
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What does the Central Nervous System consist of?
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Where do cranial nerves arise from?
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What does the Somatic Nervous System connect to?
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What are the functions of the Autonomic Nervous System?
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What are the parts of the spinal cord?
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What does the Central Canal contain?
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What do Dorsal Roots contain?
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What is Gray Matter primarily composed of?
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What gives White Matter its appearance?
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What does the Ventral Root contain?
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Study Notes
Functional Classification of Neurons
- Sensory neurons transmit impulses from sensory organs to the central nervous system (CNS), detecting internal and external changes.
- Interneurons are located within the CNS, processing and storing information and making decisions based on incoming sensory impulses.
- Motor neurons convey messages away from the CNS to effectors, facilitating actions in response to stimuli.
Divisions of the Nervous System
- The nervous system is divided into central and peripheral components.
- Central Nervous System (CNS) includes the brain and spinal cord, responsible for processing information.
- Peripheral Nervous System (PNS) consists of cranial and spinal nerves, connecting the CNS to the rest of the body.
Somatic and Autonomic Nervous Systems
- Somatic Nervous System is associated with voluntary control, linking the CNS to skin and skeletal muscles.
- Autonomic Nervous System regulates involuntary functions, connecting the CNS to visceral organs and consisting of sympathetic (emergency response) and parasympathetic components (rest and digest).
Structure of the Spinal Cord
- The spinal cord is composed of several key structures: central canal, dorsal root, dorsal root ganglion, gray matter, white matter, and ventral root.
- Central Canal contains cerebrospinal fluid, providing cushioning and support.
- Dorsal Root includes sensory neurons’ cell bodies and transmits sensory information to the spinal cord.
- Gray Matter primarily consists of interneurons and some motor neurons; it is characterized by the absence of myelin.
- White Matter, appearing white due to myelination, consists of nerve tracts that facilitate communication within the spinal cord, organized into anterior, posterior, and lateral funiculi.
- Ventral Root carries axons of motor neurons that originate in the gray matter, facilitating motor control.
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Description
This quiz focuses on the functional classification of neurons, including sensory, interneurons, and motor neurons. Each type of neuron plays a crucial role in the nervous system, relaying information and coordinating responses. Test your understanding of these essential components of neural function.