Zusammenfassung der Ressource
Heart Myocytes
- Stimulation from parasympathetic nervous system
- Acetylcholine acts on
metabotropic, muscarinic
receptors in the heart
- G-Protein is activated
- Effector protein is a K+ ion
channel (stimulated to open)
- K+ ions flow out of the cell
(down their concentration
gradient)
- Increases negativity inside the
cell (hyperpolarisation)
- Leads to decreased contraction