ANS 3 Flashcards
Presynaptic parasympathetic neurons employ _____ as a neurotransmitter?
ACh (just like postsynaptic)
Postsynaptic parasympathetic neurons use ______ as a neurotransmitter? (few exceptions)
Ach (just like presynaptic)
The ganglia of the postsynaptic parasympathetic neurons are much more ______ ? Located?
Restricted. 4 in the head, and in the wall of target organs
Why is the postsynaptic axon in parasympathetic neurons short?
Because they are located so close to the target organ (due to the LONG presynaptic neuron)
Where do the presynaptic neuron cell bodies exist in the autonomic parasympathetic division?
only in 4 pairs of brainstem nuclei and from the gray matter of S2-S4
the cranial outflow of the parasympathetic division is carried by what cranial nerves?
CN 3, 7, 9, and 10 (OR ciliary, pterygopalantine, otic, submandibular)
Name for cranial nerve 3? Location?
Ciliary ganglion; in orbit
Names for the two cranial nerve 7? Location?
Pterygopalatine ganglion; behind nasal cavity
OR
Submandibular in mandibular region
Name for cranial nerve 9? Location?
Otic ganglion; by ear
Name for cranial nerve 10? Location?
Vegas nerve; All the head (except eye, ear, and nose) all the way to GI tract
Parasympathetic nervous system does NOT innervate _______ structures
Parietal. Do NOTHING with skin aka body wall or limbs; strictly innervate visceral
Both Sym and Para systems control voluntary or involuntary structures and invoke similar or contrasting effects/functions?
Involuntary
Contrasting
- Sympathetic is a catabolic or anabolic response?
* Parasympathetic is a catabolic or anabolic response?
Sym= Catabolic -emergent response
Para= Anabolic -homeostatic response
What is Dr. Yoachem talking about for “point and shoot”?
Point= Para; Shoot= Sympathetic for ejaculate or ‘shoot’
Name for cranial nerve 10? Innervates what? Runs along what?
Vegas nerve; All the head (except eye, ear, and nose) all the way to GI tract. Runs lateral to the subclavian arteries then like along the esophagus, then all over
