Describe the Relationship Between a Proto-Oncogene and an Oncogene, and Explain

question 27

Essay

Describe the relationship between a proto-oncogene and an oncogene, and explain how one arises from the other.

---

Definitions:

Cardiac Cycle

The series of events that occur from the beginning of one heartbeat to the beginning of the next, including systole (contraction of the heart muscle) and diastole (relaxation of the heart muscle).

Atrial Repolarization

The part of the cardiac cycle in which the atria return to their resting state by the re-entry of potassium ions into the cells, often masked by ventricular depolarization on an ECG.

Systole

The phase of the cardiac cycle when the heart contracts, pumping blood out of the ventricles and into the systemic circulation.

Diastole

A phase of the cardiac cycle during which the heart muscle relaxes and the chambers fill with blood.