: difficult in a way that is usually interesting or enjoyable. Thesaurus: All synonyms and antonyms for challenging Nglish: Translation of challenging for Spanish speakers Britannica English: Translation of challenging for Arabic speakers.
To illustrate the tremendous indirect impact of emerging zoonotic diseases on public health policy and structures and on public perception of health risks, the authors provide a number of examples, including that of the Ebola virus, avian influenza, monkeypox and bovine spongiform encephalopathy.
Enhanced sensory perception is adaptive in seeking out prey whilst a surge in energy is needed to catch it. Short term stress responses enable organisms to adapt to and overcome short term stress stimuli. The stress response enables the organism to mobilise energy to fight or flee from a threat thereby enhancing its chances of survival.