Autonomic Nervous System Pathways and Innervation Quiz

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Questions and Answers

Where are the cell bodies located in the sympathetic nervous system?

Cell bodies are located in the lateral horns of the spinal cord grey matter (T1-L2/3). (correct)

Cell bodies are located in the brainstem.

Cell bodies are located in the ventral root ganglia.

Cell bodies are located in the dorsal root ganglia.

What is the pathway of pre and post ganglionic axons in the sympathetic nervous system?

Both pre and post-ganglionic axons are short.

Pre-ganglionic axons are long and post-ganglionic axons are short.

Both pre and post-ganglionic axons are long.

Pre-ganglionic axons are short and post-ganglionic axons are long. (correct)

What is the origin of splanchnic nerves and which system do they belong to?

Splanchnic nerves originate in the adrenal glands and belong to the sympathetic system.

Splanchnic nerves originate in the spinal cord and belong to the parasympathetic system.

Splanchnic nerves originate in the brainstem and belong to the parasympathetic system.

Splanchnic nerves originate in the spinal cord and belong to the sympathetic system. (correct)

What is the role of the Vagus nerve and which system does it belong to?

The Vagus nerve is important for regulating heart rate and belongs to the parasympathetic system. Signup and view all the answers

Where are the cell bodies located in the parasympathetic nervous system?

Cell bodies are located in the brainstem and the sacral spinal cord (S2-S4). Signup and view all the answers

What is the pathway of pre and post ganglionic axons in the parasympathetic nervous system?

Both pre and post-ganglionic axons are long. Signup and view all the answers

What is the role of the enteric nervous system in the autonomic nervous system?

The enteric nervous system regulates involuntary functions of the gastrointestinal tract. Signup and view all the answers

Which type of neurons respond to mechanical, thermal, osmotic, and chemical stimuli in the enteric nervous system?

Sensory neurons Signup and view all the answers

What is the main function of interneurons in the enteric nervous system?

Integrate information from sensory neurons and feedback to the enteric motor neurons Signup and view all the answers

What is the role of parasympathetic nervous system in the body?

Rest and Digest responses Signup and view all the answers

Which action is associated with the sympathetic nervous system?

Dilates bronchioles of the lung, which allows for greater alveolar oxygen exchange Signup and view all the answers

What effect does the parasympathetic nervous system have on digestion?

Increases digestion by dilating blood vessels of the GI tract, increasing blood flow Signup and view all the answers

What is the function of motor neurons in the enteric nervous system?

Control motility, secretion, and absorption by acting on smooth muscle and secretory cells Signup and view all the answers

Which response is associated with the sympathetic nervous system?

Increases heart rate and the contractility of cardiac cells, increasing the blood flow to skeletal muscles Signup and view all the answers

What is the main function of the autonomic nervous system?

Control involuntary bodily functions Signup and view all the answers

What is the relationship between the enteric nervous system and the central nervous system?

The enteric nervous system is capable and does operate on its own, independent from the central nervous system Signup and view all the answers

Where are the preganglionic cell bodies of the parasympathetic division located?

Brainstem nuclei of cranial nerves III, VII, IX, X Signup and view all the answers

Which region forms the Lesser Splanchnic Nerve?

T10-T11 Signup and view all the answers

Where do the sympathetic axons from thoracic levels travel to provide sympathetic innervation to the head?

Cervical ganglion and then as the carotid plexus around the Internal Carotid Artery Signup and view all the answers

Where do the postganglionic axons of the sympathetic nervous system synapse?

Prevertebral ganglia Signup and view all the answers

Which division of the autonomic nervous system has a 'long pre-ganglionic component' and a 'short post-ganglionic component'?

Parasympathetic division Signup and view all the answers

Which nerve supplies visceral organs in the head and travels as far caudally as the left colic flexure of the large intestine?

Vagus nerve Signup and view all the answers

Which is the intrinsic nervous system of the Gastrointestinal Tract?

Enteric nervous system Signup and view all the answers

What type of axons are myelinated in the autonomic nervous system?

Pre-ganglionic axons Signup and view all the answers

Where are the cell bodies located for the sympathetic division of the autonomic nervous system?

T1-L2 spinal cord regions Signup and view all the answers

Which regions are involved in the sympathetic innervation of the heart and lungs?

T1-T4 segments and cardiopulmonary splanchnic nerves Signup and view all the answers

What structures are involved in the sympathetic nervous system innervation of glands and blood vessels in the skin?

Specific options for the autonomic pathway Signup and view all the answers

What is the route for pre-ganglionic axons in the sympathetic autonomic pathway to reach paravertebral ganglia?

Through the white rami communicans Signup and view all the answers

Where do post-ganglionic axons synapse to reach prevertebral ganglia in the sympathetic autonomic pathway?

On splanchnic nerves Signup and view all the answers

What is the rule followed by the autonomic nervous system in terms of its divisions?

Rule of 2's, with two divisions (sympathetic and parasympathetic) Signup and view all the answers

Study Notes

Autonomic Nervous System Pathways and Innervation

The nervous system components include the somatic nervous system and autonomic nervous system, each with specific functions and structures.
The autonomic nervous system has a 2-neuron chain from the spinal cord, involving preganglionic and postganglionic axons that travel to target organs.
Pre-ganglionic axons in the autonomic nervous system are myelinated, while post-ganglionic axons are unmyelinated.
The autonomic nervous system follows the "Rule of 2's," with two divisions (sympathetic and parasympathetic) arising from specific regions of the central nervous system.
The sympathetic division has cell bodies in the T1-L2 spinal cord regions, with axons traveling internally as General Visceral Efferent (GVE) type axons.
The sympathetic nervous system involves structures such as the paravertebral ganglia, dorsal and ventral roots, and gray and white rami communicans.
The autonomic pathway involves pre-ganglionic axons leaving the lateral horn, traveling through the white rami communicans to reach paravertebral ganglia, and then synapsing on splanchnic nerves to reach prevertebral ganglia.
The sympathetic innervation of visceral organs in the thorax, abdomen, and pelvis occurs through specific pathways, with exceptions for the heart and lungs.
The sympathetic innervation of the heart and lungs involves T1-T4 segments and cardiopulmonary splanchnic nerves, with potential contributions from cervical ganglia.
The sympathetic nervous system innervates glands and blood vessels in the skin, with specific options for the autonomic pathway.
The sympathetic autonomic pathway offers various options for innervation, including specific routes for blood vessels and glands in the skin, and for visceral organs.
The sympathetic autonomic pathway involves complex neural pathways and innervation patterns, with specific routes for different target organs and structures.

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Description

Test your knowledge of autonomic nervous system pathways and innervation with this quiz. Explore the 2-neuron chain, myelination of axons, divisions, and specific innervation patterns for visceral organs, glands, and blood vessels.