<prompt> Marys law states the relationship of hea rate with which of the following parameter?Cardiac outputStroke volumeAerial BPPresystolic volume  <response>: According to Marys law hea rate is inversely propotional to Blood pressure. When blood pressure decreases baroreceptors present in the carotid sinus are inhibited and the net effect are: Increase in peripheral resistance Increased myocardial contractility Increased hea rate Increase in blood pressure 