This document is one of my best written set of notes. The autonomic nervous system is so detailed and has many elements, and I was able to cover all the material necessary. With these notes, I knew how to do any question related to autonomic nervous system on my midterm test. I also provided lots o...
➢ Describe the organization of autonomic motor neurons
What are autonomic neurons (AN)?
- A network of nerves throughout your body that can control/regulate unconscious processes such as
breathing and heart beating
- Two neuron chain
- Extends from CNS to an innervated organ
- The other division of the motor nervous systems (the other one is the somatic nervous system)
Where are parasympathetic ganglia located?
- Next to or within the organs innervated
What type of axon is involved in the parasympathetic and sympathetic nervous systems?
- Lightly myelinated preganglionic axon which joins with a non myelinated postganglionic axon
What is the difference between myelinated and unmyelinated neurons?
What are preganglionic AN?
- Arise from the CNS
- Cell bodies are located in the brain or spinal cord
- Supplies to the autonomic ganglia
- Thin, lightly myelinated fibers, type b fibers
- Synapses with one postganglionic neuron
What are postganglionic AN?
- Originate in ganglion
- Thinner non-myelinated fibers, type c fibers
- Synapses with more than one presynaptic neuron
- Innervates effector organ
*In general, postganglionic endings of the sympathetic nervous system secrete norepinephrine and are said to be
adrenergic
, What are autonomic ganglia?
- Sympathetic and parasympathetic cell bodies
- Located in the head, neck and abdomen as well as in chains along either side of the spinal cord
What is the difference between somatic and autonomic systems?
What is the difference between parasympathetic and sympathetic nervous systems?
➢ Examples of practice quiz questions (neurotransmitters, ganglia, symptoms of systems)
What neurotransmitter is released from the axon terminals of preganglionic sympathetic fibers?
- Acetylcholine
What neurotransmitter is released from the postganglionic sympathetic neurons?
- Norepinephrine
What neurotransmitter is the primary neurotransmitter released from postganglionic parasympathetic neurons?
- Acetylcholine
Which molecule is the most abundant signaling molecule released from the adrenal medulla?
- Epinephrine
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sarahmeidan. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
