PLESE HELP End OT Semester Test: Health Science 2B
11

In determining the length of time radioactive waste should be stored before disposal in normal waste, the isotope's half-life is considered. What
Is a half-life?

ОА
the time interval for a radioactive material to double in size

OB.
the time interval for a radioactive material to decay its radioactivity by half
the amount of time it takes for a radioactive material to reduce in size by half

OD. the amount of time one's life is reduced if exposed to a radioactive material

OE.
the time interval for a radioactive material to delay its radioactive exposure by half

A41-year-old man comes to the clinic complaining of a chronic cough over the past 4 months, which has now been accompanied by haemoptysis. he denies smoking or any past medical history. on physical examination, his head and neck examination is normal. his lungs have diffuse bilateral rales. cardiac examination is normal. laboratory findings reveal na 142 meq/l, k 4.2 meq/l, cl 110 meq/l, hco3 24 meq/l, bun (blood urea nitrogen) 39 mg/dl, creatinine 2.9 mg/dl. urinalysis reveals microscopic haematuria and 4+ proteinuria. which of the following serologic blood tests would most confirm the suspected diagnosis? - anti-glomerular basement membrane antibodies- anti-mitochondrial antibodies- anti-neutrophilic antibodies- anti-parietal cell antibodies- anti-smooth muscle antibodies