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.
Reason Why It is Conducted. A serum cortisol test is taken to determine the functioning of the adrenal and pituitary glands. This helps in the diagnosis of several adrenal and pituitary gland related diseases.A normal result from this test would range from 6 to 23 mcg/dL (micrograms per deciliter).ortisol serum test is a blood test, so preparation for this will mostly mean going off any prescription drug that could affect cortisol levels. Drugs which cause an increase in cortisol levels include estrogens, synthetic glucocorticoids.