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Questions and Answers
What is the main function of the autonomic nervous system?
What is the main function of the autonomic nervous system?
Which of the following is NOT a component of the central nervous system?
Which of the following is NOT a component of the central nervous system?
What is the main role of sensory (afferent) nerves?
What is the main role of sensory (afferent) nerves?
What is the main role of motor (efferent) nerves?
What is the main role of motor (efferent) nerves?
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How many pairs of spinal nerves are there in the human body?
How many pairs of spinal nerves are there in the human body?
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What is the function of the somatic nervous system?
What is the function of the somatic nervous system?
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Which component is responsible for processing signals and issuing the final order for a proper response in the reflex arc?
Which component is responsible for processing signals and issuing the final order for a proper response in the reflex arc?
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Where are the lateral or 'paravertebral' ganglia located?
Where are the lateral or 'paravertebral' ganglia located?
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What is the main function of the terminal ganglia?
What is the main function of the terminal ganglia?
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What is the average ratio between preganglionic and postganglionic fibers in autonomic ganglia?
What is the average ratio between preganglionic and postganglionic fibers in autonomic ganglia?
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Study Notes
Autonomic Nervous System
- Regulates involuntary physiological functions, including heart rate, digestion, and respiratory rate.
- Maintains homeostasis by controlling smooth muscle and gland activities.
Central Nervous System Components
- Consists of the brain and spinal cord.
- Peripheral nerves, such as cranial and spinal nerves, are NOT part of the central nervous system.
Role of Sensory Nerves
- Transmit sensory information from peripheral receptors to the central nervous system.
- Involved in relaying information about external and internal stimuli.
Role of Motor Nerves
- Carry signals away from the central nervous system to effector organs, such as muscles and glands.
- Facilitate voluntary and involuntary movements.
Pairs of Spinal Nerves
- The human body has 31 pairs of spinal nerves.
- These nerves emerge from the spinal cord and are responsible for transmitting signals.
Somatic Nervous System Function
- Controls voluntary movements by regulating skeletal muscle activity.
- Associated with somatic reflexes for immediate response to stimuli.
Reflex Arc Processing
- The spinal cord processes signals and issues commands in the reflex arc.
- It serves as the integration center for reflex actions, bypassing brain involvement for quicker responses.
Location of Lateral or 'Paravertebral' Ganglia
- Situated alongside the spinal column.
- Part of the sympathetic nervous system, involved in the fight-or-flight response.
Function of Terminal Ganglia
- Located near or within the target organs.
- Responsible for relaying signals to effectors in the parasympathetic nervous system.
Preganglionic and Postganglionic Fiber Ratio
- Average ratio of preganglionic to postganglionic fibers in autonomic ganglia is about 1:20.
- This indicates a high degree of divergence in the autonomic nervous system, allowing widespread effects.
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Description
Test your knowledge of the autonomic nervous system, nervous system components, reflex arcs, and the control systems of the human body. This quiz covers understanding the controlling systems of the human body, identifying the components of the nervous system, and studying the importance of the autonomic nervous system.
