Activity Activity An active process; excludes processes and mechanisms which fulfill biological functions. C43431 BRIDG General activity Activity Any action that can, in the context of a study, experiment, post-marketing investigation, or disease registry, be defined, planned, scheduled or performed. EXAMPLE(S): Administrative activities such as subject registration or informed consent Clinical activities such as surgical procedure, laboratory test, administration of a drug OTHER NAME(S): NOTE(S): Any action that can, in the context of a study or a post-marketing investigation, be defined, planned, scheduled or performed. EXAMPLE(S): surgical procedure, laboratory test, administration of a drug. Activity C0441655 Activity