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Questions and Answers
What is the function of the Somatic system in the peripheral nervous system?
What is the function of the Somatic system in the peripheral nervous system?
- Transmits impulses from the CNS to smooth muscles, glands, or the heart
- Responsible for all involuntary functions
- Sends impulses to effector organs for voluntary functions (correct)
- Receives signals from the internal or external environment and sends them to the CNS
Where is the gray matter located in the central nervous system?
Where is the gray matter located in the central nervous system?
- In the periphery of the spinal cord, surrounding the gray matter
- Formed mostly by nerve fibers and neuroglial cells
- In the brain and spinal cord (correct)
- In the center of the spinal cord, with the shape of an H
What is the main function of the Autonomous system in the peripheral nervous system?
What is the main function of the Autonomous system in the peripheral nervous system?
- Receives signals from the internal or external environment and sends them to the CNS
- Sends impulses to effector organs for involuntary functions (correct)
- Responsible for all voluntary functions
- Responsible for all involuntary functions
What gives white matter its white color in the central nervous system?
What gives white matter its white color in the central nervous system?
Where is the gray matter located in the spinal cord?
Where is the gray matter located in the spinal cord?
What does the Motor (efferent) component of the Peripheral Nervous System do?
What does the Motor (efferent) component of the Peripheral Nervous System do?
Where are the bodies of motor neurons located in the spinal cord?
Where are the bodies of motor neurons located in the spinal cord?
Which layer in the cerebellum contains the smallest neurons of the body?
Which layer in the cerebellum contains the smallest neurons of the body?
What is the function of the sympathetic nervous system?
What is the function of the sympathetic nervous system?
What surrounds the bundles of nerve fibers located outside the central nervous system?
What surrounds the bundles of nerve fibers located outside the central nervous system?
Where do the majority of interneurons in the brain form communication networks for integration of sensory and motor neurons?
Where do the majority of interneurons in the brain form communication networks for integration of sensory and motor neurons?
What is the function of the parasympathetic nervous system?
What is the function of the parasympathetic nervous system?
Which layer in the cerebellum contains a row of large interneurons called Purkinje cells?
Which layer in the cerebellum contains a row of large interneurons called Purkinje cells?
What is a reflex arc in the spinal cord responsible for?
What is a reflex arc in the spinal cord responsible for?
Which layer surrounds the cerebrospinal fluid and blood vessels in the meninges?
Which layer surrounds the cerebrospinal fluid and blood vessels in the meninges?
Where do the neurons of the autonomous nervous system originate?
Where do the neurons of the autonomous nervous system originate?
What is a characteristic of sensitive ganglia?
What is a characteristic of sensitive ganglia?
What is the function of the sympathetic nervous system in situations of stress?
What is the function of the sympathetic nervous system in situations of stress?
What is the main function of the Somatic system in the peripheral nervous system?
What is the main function of the Somatic system in the peripheral nervous system?
Where do the neurons of the autonomous nervous system originate?
Where do the neurons of the autonomous nervous system originate?
What gives white matter its white color in the central nervous system?
What gives white matter its white color in the central nervous system?
Where is the gray matter located in the central nervous system?
Where is the gray matter located in the central nervous system?
What is a characteristic of sensitive ganglia?
What is a characteristic of sensitive ganglia?
What is the function of the sympathetic nervous system in situations of stress?
What is the function of the sympathetic nervous system in situations of stress?
What is the function of the cerebellum?
What is the function of the cerebellum?
Where do the bodies of motor neurons in the spinal cord reside?
Where do the bodies of motor neurons in the spinal cord reside?
What is the primary function of the sympathetic nervous system?
What is the primary function of the sympathetic nervous system?
Where do the majority of interneurons form communication networks for integration of sensory and motor neurons?
Where do the majority of interneurons form communication networks for integration of sensory and motor neurons?
What gives white matter its color in the central nervous system?
What gives white matter its color in the central nervous system?
What is a characteristic of sensitive ganglia?
What is a characteristic of sensitive ganglia?
What is the main function of the autonomous system in the peripheral nervous system?
What is the main function of the autonomous system in the peripheral nervous system?
What surrounds bundles of nerve fibers located outside the central nervous system?
What surrounds bundles of nerve fibers located outside the central nervous system?
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Study Notes
Peripheral Nervous System
- The Somatic system is responsible for transmitting sensory information from the body to the CNS and motor signals from the CNS to the muscles and glands.
- The Autonomous system, also known as the Autonomic nervous system, regulates involuntary functions such as heart rate, digestion, and breathing.
Central Nervous System
- Gray matter is located in the outer layer of the brain and spinal cord, and contains the majority of the CNS's neurons.
- White matter gets its white color from the myelin sheath, a fatty substance that surrounds and insulates the axons of neurons.
Spinal Cord
- The gray matter in the spinal cord is located in the inner portion, surrounded by white matter.
- The bodies of motor neurons are located in the gray matter of the spinal cord.
Cerebellum
- The Purkinje cell layer contains a row of large interneurons called Purkinje cells, which are the smallest neurons in the body.
Reflex Arc
- A reflex arc in the spinal cord is responsible for automatic responses to stimuli, bypassing the brain.
Meninges
- The pia mater layer surrounds the cerebrospinal fluid and blood vessels in the meninges.
Autonomous Nervous System
- The neurons of the autonomous nervous system originate in the brain stem and spinal cord.
- The sympathetic nervous system, a part of the autonomous nervous system, is responsible for the "fight or flight" response in situations of stress, increasing heart rate and blood pressure.
- The parasympathetic nervous system, another part of the autonomous nervous system, promotes relaxation and reduces stress, slowing heart rate and promoting digestion.
Sensitive Ganglia
- Sensitive ganglia are characterized by the presence of nerve cell bodies outside the CNS.
Cerebrum
- The majority of interneurons form communication networks for integration of sensory and motor neurons in the cerebrum.
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