Since the heart’s ventricles are substantially stronger than its atria, the greater waves signify ventricular contraction. In contrast to the ventricles, which are in charge of pumping blood throughout the body, the atria only need to pump blood a short distance away from them. They must therefore pump more vigorously.
Reason Behind Why the Larger Waves Seen on the Oscilloscope
Compared to atrial contraction, the force needed to pump blood during ventricular contraction is larger. Therefore, a great deal of force is required to deliver blood to the systemic circulation that travels throughout the entire body. The smaller waves signify the atria contracting and the larger waves signify the other one.
When You Increase the Frequency of the Stimulation What Do You Think Will Happen to the Amplitude Height of the Ventricular Systole Wave?
When you increase the frequency of the simulation, the amplitude height of the ventricular systole wave will not change. It is because the maximum threshold, which is determined by the X voltage required for calcium channels to open, will not alter in cardiac muscle cells as with any other cells.
No additional voltage can make the channels open any more beyond this point or again before depolarization. Additionally, the extended cardiac refractory period hinders summation, which results in no change in amplitude.
What Effect Will Increasing the Temperature of the Ringer’s Solution Have on the Heart Rate of the Frog?
A frog heart’s mechanical and electrical activity was observed as it underwent various temperature changes, stretching exercises, and medication treatments. The LabTutor software’s Power Lab was linked to a force transducer that was attached to a dissected frog to display its beating heart.
Heart rate and contractile force were measured using separate procedures that involved stretching the heart to increasing degrees, applying different temperatures of Frog Ringer’s solutions to the heart, and administering various drug treatments such as acetylcholine, epinephrine, pilocarpine, and atropine.
The Frog Ringer’s heart rate increased as their body temperature rose. The contractile force increased as the degree of stretch increased. When administered, acetylcholine and pilocarpine lowered heart rate.
What Do You Think Would Happen to the Heart Rate of the Vagus Nerve Was Cut?
Among parasympathetic nerves, the vagus nerve is one. The parasympathetic nerve system controls the body’s “rest and digest” processes and aids in lowering heart rate. The heart will continue to beat if the vagus nerve is severed from the heart, but the loss of parasympathetic innervation will cause the heart rate to rise.
The sinoatrial node experiences spontaneous depolarization, which triggers the heart’s autorhythmic contraction. About 80–100 times per minute, the sinoatrial node will produce an action potential. These depolarizations cause the resting heart rate to drop to about 60 beats per minute thanks to vagus nerve innervation.
Using the right sensor, an oscilloscope can be used to track heart rate. Since it monitors the strength of the contractions, it seems likely that the ventricle, which has higher muscle mass, is producing the larger waves.