[Solved] When the cholinergic vagal fibres to nodal tissues are stimulated:

Q.	When the cholinergic vagal fibres to nodal tissues are stimulated:
A.	the membrane becomes hyper-polarised
B.	the slope of the pre-potential is decreased
C.	acetylcholine decreases conductance to Ca++ via muscarinic receptors
D.	acetylcholine increases the permeability of nodal tissues to K+ via muscarinic receptors
E.	all of the above are true
Answer» E. all of the above are true

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