What action occurs in the x-ray machine when starting the first step of a two-part exposure process?

The correct response indicates that when initiating the first step of a two-part exposure process in an x-ray machine, the anode rotates and the filament is heated.

In x-ray machinery, the process begins with the heating of the filament within the cathode. This heating generates electrons through thermionic emission. Concurrently, the anode begins to rotate to ensure that the x-ray source is continuously moving across the target, allowing for better heat distribution and preventing damage to the anode from the high temperatures generated during x-ray production.

This dual action is crucial for efficient x-ray generation; the rotating anode allows for longer exposure times without overheating localized areas, while the heated filament ensures that a sufficient number of electrons are emitted to produce x-rays upon striking the anode. The synergy of these two processes optimizes the imaging quality and safety during diagnostic procedures.