blood pressure reading is typically expressed as systolic over diastolic (e.g. 120 / 80). What is the nysiological significance of the second (diastolic) number? it represents the greatest pressure in your arteries during contraction of the heart it represents your heart rate it represents the pressure your heart must overcome to eject blood into the aorta it represents the pressure in your large veins

Put the following events in the proper order for cardiac conduction. Group of answer choices:   SA Node initiates action potential AV node initiates action potential Signal moves to AV bundle in between the ventricle Purkinje fibers lead to ventricular contraction Signal travels to AV node Purkinje fibers lead to atrial contraction   1  2                                      3                                                                                                 4

In the ECG pictured, which part of the P-QRS-T pattern indicates where ventricular contraction is occuring?

during the four phases of the cardiac cycle. Which valves open/close during these phases? Ventricular Isovolumetric Ventricular Isovolumetric Filling Contraction Ejection Relaxation Blood Flow Low Ventricular Volume Ventricular Pressure Aortic Pressure Which valves open/close in the beginning of

Right ventricular pressure is always the same as left ventricular pressure

Consider a person standing up from a supine position. How do each of the following parameters change in the first seconds after standing compared to what they were at rest, before they return to normal set point? Total Peripheral Resistance (TPR) Venous Return End Diastolic Volume (EDV) Stroke Volume Heart Rate Mean Arterial Pressure (MAP) [Choose ] ✓ [Choose ] No change Decrease Increase [Choose ] [Choose ] [Choose ]

In a normal EKG, in the pre- cordial leads (V leads) where should the normal 2 wave transition coour

What is happening during the phase labeled with the arrow? Atrial depolarization Ventricular depolarization Ventricular repolarization or  AV valve closure

Number the structures involved in depolarization of heart from the one which depolarizes first (1) to the one which depolarizes last. A-V node Purkinje fibers right and left bundle branches atria

The marks a spot of dead myocardial cells. How does this change the depolarization and muscle contraction patterns in specific locations of the heart? M Pulmonary semilunar valve Aortic semilunar valve Right AV- valve Left AV valve