Lecture 1-Neurotransmitters Of The GI Tract Flashcards
1
Q
Acetylcholine-source?
A
Cholinergic neurons
2
Q
Acetylcholine-actions?
A
- Contraction of smooth muscle
- Relaxation of sphincters
- Increased salivary secretion, gastric secretion, and pancreatic secretion
3
Q
Norepinephrine-source?
A
Adrenergic neurons
4
Q
Norepinephrine-actions?
A
- Relaxation of smooth muscle
- Contraction of sphincters
- Increased salivary secretion
5
Q
Vasoactive intestinal peptide (VIP-same as GIP?)-source?
A
Neurons of the mucosa and smooth muscle
6
Q
VIP-actions?
A
- Relaxation of smooth muscle
- Increased intestinal secretion and pancreatic secretion
7
Q
Gastrin-releasing peptide (GRP)-source?
A
Neurons from gastric mucosa
8
Q
GRP-actions?
A
Increased gastric secretion
9
Q
Enkephalins-source?
A
Neurons of the mucosa and smooth muscle
10
Q
Enkephalins-actions?
A
- Contraction of smooth muscle
- Increased intestinal secretion
11
Q
Neuropeptide Y (NPY)-source?
A
Neurons of the mucosa and smooth muscle
12
Q
NPY-actions?
A
- Relaxation of smooth muscle
- Increased intestinal secretion
13
Q
Substance P-source?
A
Co-release with Ach from cholinergic neurons
14
Q
Substance P-actions?
A
- Contraction of smooth muscle
- Increased salivary secretion
