What is a MacGuffin? Home >> Screenwriting >> MacGuffin. Simply put, a MacGuffin is an object of interest around which the plot revolves. The term was made popular by director Alfred Hitchcock, who constantly used both the name and the technique. In Hitchcock's Words
Guide. A cortisol test is done to measure the level of the hormone cortisol in the blood. The cortisol level may show problems with the adrenal glands or pituitary gland.Cortisol is made by the adrenal glands. Cortisol levels go up when the pituitary gland releases another hormone called adrenocorticotropic hormone (ACTH).uide. A cortisol test is done to measure the level of the hormone cortisol in the blood. The cortisol level may show problems with the adrenal glands or pituitary gland. Cortisol is made by the adrenal glands.
Cortisol is the primary glucocorticoid of the adrenal cortex. Ten to 20% of circulating cortisol is loosely attached to albumin and 70 or 80% is bound to transcortin. The remaining 10% is unbound. Total serum cortisol is measured in the laboratory. Serum cortisol levels are lowest about 04:00, rise to their highest levels about 08:00, and then fall throughout the day to a nadir of 50% of the peak level by 20:00 hours.