Q. When the cholinergic vagal fibres to nodal tissues are stimulated: (Solved)
1. the membrane becomes hyper-polarised
2. the slope of the pre-potential is decreased
3. acetylcholine decreases conductance to Ca++ via muscarinic receptors
4. acetylcholine increases the permeability of nodal tissues to K+ via muscarinic receptors
5. all of the above are true
- e. all of the above are true