Photon absorption within the body occurs as the result of:

A radiographer can best reduce the amount of scatter radiation from reaching the receptor by:

The air-gap technique reduces the amount of scatter radiation reaching the IR because:

Select the following that affects the enzyme rate/activity

The sum of all chemical reactions is called ___

In the lab, what is the substrate of the catalase test?

Cool temperatures speed molecules up. Hot temperatures slow molecules down 

If a catalase tests does not produce bubbles, what can be assumed?

The reaction rate will increase indefinitely with increased substrate concentration and constant enzyme concentration 

Enzymes are highly specific for the reaction they catalyze and not used up in the reaction