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.
If the adrenal glands are functioning normally, then cortisol levels will rise with the ACTH stimulation. If they are damaged or not functioning properly, then the cortisol level will be low. A longer version of this test (1-3 days) may be performed to help distinguish between adrenal and pituitary insufficiency. cortisol test may be ordered when a person has symptoms that suggest a high level of cortisol and Cushing syndrome, such as. 1  High blood pressure (hypertension). 2  High blood sugar (glucose). 3  Obesity, especially in the trunk. 4  Fragile skin. 5  Purple streaks on the abdomen. 6  Muscle wasting and weakness. 7  Osteoporosis.