Since the invention of agriculture, humans have increasingly used exogenous sources of energy to multiply human muscle-power.

Infections with cysticercus occur after humans consume the ova from exogenous sources or through self-infection via the fecal-oral route.

By inhibiting ethene perception, fruits, plants and flowers don't respond to ethene produced endogenously or from exogenous sources.

ROS are also generated by exogenous sources such as ionizing radiation.

Concomitant administration of other exogenous sources of sulfhydryl groups such as methionine and captopril may produce a similar interaction.

Such exogenous and endogenous sources of DNA damage are indicated in the boxes at the top of the figure in this section.

This approach demonstrated that flavoHb is indeed enzymatically active within human and murine cells and potently blocks exogenous and endogenous sources of nitrosative stress.

Ethanol both from exogenous and endogenous sources and, its more toxic metabolite, acetaldehyde, have also been implicated in both osteoporosis and osteonecrosis.

And it appears that VOC compounds in the body "may be either produced by metabolic processes or inhaled/absorbed from exogenous sources" such as environmental tobacco smoke.

DNA damage occurs very frequently and is generated from exposure to a variety of both exogenous and endogenous genotoxic sources.