Neuropeptides

Question 1

what are neuropeptides?

Answer 1

small protein-like molecules synthesised from larger precursors

used by neurones to communicate with each other

3-30 amino acids long

more than 100 different neuropeptides
- 90 genes encode the precursors

Question 2

when was neuropeptide signalling established?

which organisms use neuropeptide signalling widely?

Answer 2

before small molecule transmitters

sea anemones, coral, jelly fish

Question 3

what are neurohormones?

give 2 examples

Answer 3

neuropeptides produced in the hypothalamus and act in peripheral tissues

vasopressin
= anti-diuretic involved in water retention in kidney

CCK
= acts in the GI tract