Which of the following are mechanisms by which cardiac arrhythmias may arise?3 options, no partial credit

A 64-year-old man with ischemic cardiomyopathy is admitted for monitoring after experiencing several episodes of ventricular tachycardia. On telemetry (continuously monitoring a patient’s heart rhythm (ECG) using wireless technology) , a premature ventricular complex (PVC) is noted occurring on the T wave of the preceding beat—an “R-on-T” phenomenon.Which of the following statements about this period are correct? 4 options. Partial credit is available for this question

Picture3.png Examine the ECG provided. Select the diagnosis that best corresponds to the rhythm shown. Additionally, consider the potential effects of this rhythm on cardiac output and the patient’s overall condition. 6 options, partial credit is available  

The rusting of the sheet metal of a car is an example of:  

Which of the following is a true statement about a redox reaction.  

A salt bridge between half-reactions maintains the electrical balance of a galvanic cell. This bridge is filled with:  

Single use, non-rechargeable batteries are referred to as secondary cells.

Calculate the cell potential (E0) for a galvanic cell formed from the following two half-reactions?   Ni2+(aq) + 2 e− Ni(s) E0 = −0.25 V   Mn2+(aq) + 2 e− Mn(s) E0 = −1.18 V  

The cathode is represented as being the substance that:   

Which of the following species undergoes reduction in the formation of iron (III) oxide?4Fe(s) + 3O2 (g) → 2Fe+3 + 3O2-(aq)