What happens to the spinal nerve after it exits the spinal column?

Nervous System Pathways and Receptors

Flashcard
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Biology
•
Professional Development
•
Hard

Darryl Castaneda
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12 questions
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1.
FLASHCARD QUESTION
Front
Back
The spinal nerve divides into the ventral and dorsal rami, which contain both sensory and motor fibers.
2.
FLASHCARD QUESTION
Front
What is the role of each pair of spinal nerves?
Back
Each pair of spinal nerves is responsible for a specific area of the body. For example, the T1 and T2 nerves supply the top of the chest, arm, and hand, while the T3, T4, and T5 nerves supply the chest wall and aid in breathing.
3.
FLASHCARD QUESTION
Front
Where do signals in the sympathetic nerve route originate?
Back
Signals originate in the thoracic region (T1-T6) of the spinal cord.
4.
FLASHCARD QUESTION
Front
What is the path of signals in the sympathetic nerve route?
Back
Signals enter the sympathetic chain, synapse with ganglia in the chain, and postganglionic fibers travel from the ganglia to target organs.
5.
FLASHCARD QUESTION
Front
What are the origins of the splanchnic nerves?
Back
The greater splanchnic nerve originates from the T5–T9 spinal roots, the lesser splanchnic nerve from the T10–T11 roots, and the least splanchnic nerve from the T12 root.
6.
FLASHCARD QUESTION
Front
What is the function of the splanchnic nerves?
Back
The splanchnic nerves transmit signals in the abdominal cavity and contribute to the celiac plexus. The postsynaptic fibers of the greater splanchnic nerve supply the foregut organs.
7.
FLASHCARD QUESTION
Front
What is the sympathetic division of the autonomic nervous system (ANS)?
Back
The sympathetic division prepares the body for physical activity or danger, known as the 'fight-or-flight' response, by activating organ systems to increase heart rate, breathing rate, and blood pressure, while decreasing digestion and urination.
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