Do the fingerprint readers on phones check if there is a pulse? I believe that most biometric readers for security (e.g., offices and such) look for a pulse or

Do the fingerprint readers on phones check if there is a pulse? I believe that most biometric readers for security (e.g., offices and such) look for a pulse or other indicator so using a severed body-part would not work. Always annoys me when I see that done in movies. (One office I worked in had fingerprint access. The bathrooms were outside the secured area, and I soon got into the habit of rubbing my hands together after washing to warm them up, as a cold finger wouldn't read.)