Which cranial nerves have a negative chronotropic effect on heart rate? glossopharyngeal nerves (CN IX) trochlear nerves (CN IM) hypoglossal nerves (CN XII) vagus nerves (CN X) What best describes the Frank-Starling law? The Frank-Starling low states that the slower the heart rate, the greater the cardiac output. The Frank-Starling taw states that the preater the volume of thood discurged from the heart. the greater the pressure required to discharge the blood. The Frank-Starling law states that the greater the stroke volume, the greater the heart rate. The Frank-Staring thin states that the more the verificaliv muste cells are stretched, the more forcefully they contract. Next ,