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Where do the parasympathetic nerves originate in the body?
The parasympathetic nerves originate in the brainstem and the sacral region of the spinal cord.
Does parasympathetic or sympethetic arise from cranial or sacral nerves?
Parasympathetic
When the parasympathetic division is stimulated what neurotransmitter is released at the effector organ?
Acetylcholine is the main neurotransmitter released at the effector organ when the parasympathetic division is stimulated.
What are the two nerves that carry the preganglionic axons to the parasympathetic ganglia?
The two nerves that carry preganglionic axons to the parasympathetic ganglia are the cranial nerves and the sacral spinal nerves. Specifically, cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus) are involved. Additionally, the sacral spinal nerves S2 to S4 contribute to the pelvic splanchnic nerves, which also carry preganglionic parasympathetic fibers. These pathways play a crucial role in the parasympathetic division of the autonomic nervous system, facilitating various involuntary functions.
Arises from cranial and sacral nerves?
The Parasympathetic Division arises from cranial and sacral nerves.
What type of nerves would you find in the heart?
parasympathetic
Does parasympathetic nerves secrete norepinephrine?
No. They secrete acetylcholine only.
Parasympathetic nerve is the nerve of tomorrow?
Parasympathetic nerves are called the nerves of tomorrow because they are responsible for bringing the body functions back to the normal state after an emergency. They maintain homeostasis at the time of no stress.
What cranial nerves does not contain preganglionic parasympathetic fibers?
optic (II)
Is sympathetic or parasympathetic arises from spinal nerves T1 through L3?
Sympathetic.
What are the nerves that carry parasympathetic impulses to the enteric nervous systems?
vagus nerve
Which autonomic nerves speed up the heart and which slows it down?
The sympathetic nerves speed up the heart rate, while the parasympathetic nerves slow it down.
