ASCP- Clinical Chemistry questions with correct answers

Diurnal variation CORRECT ANSWER Changes in concentration of an analyte based on the time of the day (measured at day vs. night time) What is increased in the AM? (b/c of diurnal variation) CORRECT ANSWER ACTH, Cortisol, Iron ACTH CORRECT ANSWER adrenocorticotropic hormone- stimulates adrenal cortex to secrete CORTISOL How does stress affect chemistry values? CORRECT ANSWER Increase in ACTH, cortisol, and catecholamines Catecholamines CORRECT ANSWER Hormones made by adrenal glands (on top of kidneys) during stress. Ex.) dopamine, epinephrine, norepinephrine Which analyte values are affected if delay in processing b/c serum/plasma is not separated in time? CORRECT ANSWER Ammonia, lactic acid, K, Mg, LD, glucose Components of Spectrophotometry (in order) CORRECT ANSWER Light source- monochromator- cuvette- photodetector- readout Fluorometry components (in order) CORRECT ANSWER Light source- primary monochromator- cuvette- secondary monochromator- detector- readout When is thin-layer chromatography primarily used? CORRECT ANSWER Screening test for drugs of abuse in urine