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Flashcards in Neuromodulators Deck (14):
1

Cholinergic neurons secrete which neurotransmitter?

acetylcholine

2

What is the action of acetylcholine in the gut?

Contraction of smooth muscles in wall; relaxation of sphincters

Increased salivary, gastric and pancreatic secretions

3

Adrenergic neurons secrete which neurotransmitter?

Norepinephrine

4

What is the action of NE in the gut?

Relaxation of smooth muscles in the wall; contraction of sphincters

Increased salivary secretion

5

What cells release Vasoactive Intestinal Peptide?

Neurons of mucosa and smooth muscle

6

What is the action of VIP?

Relaxation of smooth muscle

Increased intestinal and pancreatic secretions

7

What cells release gastrin-releasing peptide (GRP) or Bombesin?

Neurons of mucosa and smooth muscle

8

What is the action of GRP?

Increased gastric secretion

9

What cells release enkephalins (opiates)?

Neurons of mucosa and smooth muscle

10

What is the action of enkephalins?

Contraction of smooth muscle

Decreased intestinal secretion

11

What cells release neuropeptide Y?

Neurons of the mucosa and smooth muscle

12

What is the action of neuropeptide Y?

Relaxation of smooth muscle

Decreased intestinal secretion

13

What cells secrete Substance P?

Substance P is co-secreted with ACh from cholinergic neurons

14

What is the action of substance P?

Contraction of smooth muscle

Increased salivary secretion