In this diagram of G-protein-coupled receptor activation, the alpha, beta, and gamma subunits are shown with distinct relationships to the plasma membrane. After exchange of GDP with GTP on the ...

After emitting an alpha or beta particle, the nucleus will often still be ‘excited’ and will need to lose energy. It does this by emitting a high energy electromagnetic wave called a gamma ray.

A high voltage supply is connected across the casing of the tube and the central electrode as shown in the following diagram. When alpha, beta or gamma radiation enters the tube it produces ions ...