ANS Lecture 6 Flashcards
Where is Acetylcholine a transmitter at?
- All autonomic ganglia
- All parasympathetic postganglionic endings
- A few sympathetic postganglionic endings (sweat glands)
Where is Noradrenaline a Transmitter at?
•Most sympathetic postganglionic endings
What are NANC’s?
Non-Adrenergic, Non-cholinergic transmitters. Transmitters other than ACh and Noradrenaline
What are examples of NANC’s?
- Peptides (vasoactive intestinal peptide VIP, neuropeptide Y NPY)
- Amines (Dopamine, 5HT)
- Amino acids (GABA)
- Gases (Nitric oxides, Carbon Monoxide)
What is the Concept of CO transmission?
It’s the idea that a neuron can release more than one type of neurotransmitter
What is Vasoactive Intestinal Peptide (VIP)?
A peptide discovered in the digestional tract that has activity of the blood vessels. It can act as a hormone or a neurotransmitter
Where are the cell bodies of the Parasympathetic nervous system found?
In the Cranial and Sacral region of the spinal cord
Where are the cell bodies of the Sympathetic nervous system found?
The thoracolumbar region
What is the exception to the idea that nerves with higher up origins innervate higher orgins?
Nerve X, the vagus nerve which innervates many things in the lower region of the body
How does the Parasympathetic nervous system affect the eye?
Constricts for near vision
How does the Parasympathetic system affect the Heart?
Decreases hear rate
How does the Parasympathetic nervous system affect Salivary Glands?
Creates lot of water saliva
How does the Parasympathetic nervous system affect the glands of the Stomach and the Pancreas?
Increases secretion
How does the Parasympathetic nervous system affect Sweat Glands?
It doesn’t because there is no innervation
How does the Parasympathetic nervous system affect Blood vessels?
It doesn’t because there is no innervation
