Janine was very active throughout her early adulthood and maintained a very high fitness level. if she wants to maintain this fitness level throughout her middle adulthood, how might her participation in physical activity and exercise be impacted? a. janine should reduce the amount of time she spends exercising because it is easier to maintain fitness levels as you age. b. janine should keep her current exercise program because, once a high level of fitness is reached, it never changes. c. janine should increase the intensity or length of her exercise programs because it is more difficult to maintain high fitness levels as you age. d. janine should stop exercising completely because it is not safe for middle-aged adults to exercise.

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