A 35-year-old woman presents to the clinic for a several-month history of heat intolerance. She lives in a small apartment with her husband and reports that she always feels hot and sweaty, even when their air conditioning is on high. On further questioning, she's also had a 4.5 kg (10 lb) unintentional weight loss. The vital signs include: heart rate 102/min and blood pressure 150/80 mm Hg. The physical exam is notable for warm and slightly moist skin. She also exhibits a fine tremor in her hands when her arms are outstretched. Which of the following laboratory values is most likely low in this patient?
ATriiodothyronine (T3)
BThyroxine (T4)
CCalcitonin
DGlucose
EThyroid-stimulating hormone
A 24-year-old man presents for an annual check-up. He is a bodybuilder and tells you he is on a protein-rich diet that only allows for minimal carbohydrate intake. His friend suggests he try exogenous glucagon to help him lose some excess weight before an upcoming competition. Which of the following effects of glucagon is he attempting to exploit?
AIncreased glucose utilization by tissues
BDecreased blood cholesterol level
CIncreased hepatic gluconeogenesis
DIncreased lipolysis in adipose tissues
EIncreased hepatic glycogenolysis
A 65-year-old male prisoner goes on a hunger strike to protest the conditions of his detainment. After 5 days without food, he suffers a seizure for which he is taken into a medical facility. On physical examination, he looks pale and diaphoretic. His blood glucose level is 50 mg/dL. In order to keep a constant supply of energy to his brain, which of the following molecules is his liver releasing into the bloodstream?
AGlycogen
BGlucose-6-phosphate
Cß-hydroxybutyric acid
DFatty acids
EGlucose-1-phosphate
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