Questão 572c5d90-a5
Prova:UFU-MG 2018
Disciplina:Inglês
Assunto:Interpretação de texto | Reading comprehension
New Studies Link Cell Phone Radiation with Cancer
Researchers call for greater caution, but skeptics say the
evidence from rat studies is not convincing
By Charles Schmidt
Does cell phone radiation cause cancer? New
studies show a correlation in lab rats, but the evidence may
not resolve ongoing debates over causality or whether any
effects arise in people.
The ionizing radiation given off by sources such as
x-ray machines and the sun boosts cancer risk by shredding molecules in the body. But the nonionizing
radio-frequency (RF) radiation that cell phones and other wireless devices emit has just one
known biological effect: an ability to heat tissue by exciting its molecules. Still, evidence advanced
by the studies shows prolonged exposure to even very low levels of RF radiation, perhaps by
mechanisms other than heating that remain unknown, makes rats uniquely prone to a rare tumor
called a schwannoma, which affects a type of neuron (or nerve cell) called a Schwann cell.
Disponı́vel em: <https://www.scientificamerican.com>. Acesso em: 29 mar. 2018.
Com base no texto, afirma-se que
New Studies Link Cell Phone Radiation with Cancer
Researchers call for greater caution, but skeptics say the
evidence from rat studies is not convincing
By Charles Schmidt
Does cell phone radiation cause cancer? New
studies show a correlation in lab rats, but the evidence may
not resolve ongoing debates over causality or whether any
effects arise in people.
The ionizing radiation given off by sources such as
x-ray machines and the sun boosts cancer risk by shredding molecules in the body. But the nonionizing
radio-frequency (RF) radiation that cell phones and other wireless devices emit has just one
known biological effect: an ability to heat tissue by exciting its molecules. Still, evidence advanced
by the studies shows prolonged exposure to even very low levels of RF radiation, perhaps by
mechanisms other than heating that remain unknown, makes rats uniquely prone to a rare tumor
called a schwannoma, which affects a type of neuron (or nerve cell) called a Schwann cell.
Disponı́vel em: <https://www.scientificamerican.com>. Acesso em: 29 mar. 2018.
Com base no texto, afirma-se que
A
o celular provoca um tipo de tumor em seres humanos.
B
a radiação RF não causa efeitos biológicos.
C
o estudo comprova o perigo causado pelo celular em humanos.
D
a exposição à radiação ionizante afeta moléculas do corpo.
