All are effects of sympathetic stimulation, EXCEPT:: (A) Increased conduction velocity, (B) Increased hea rate, (C) Increased refractory period, (D) Increased contractility of hea
Answer is C. C i.e. Increased refractory periodEffect of sympathetic system on hea mediated by Pi and (ix receptorsSA nodeIncrease in hea rateA.V. nodeIncrease in conduction velocityHis- Purkinje systemIncrease in conduction velocityAtriaIncrease in contractility & conduction velocityVentriclesIncrease in contractility