The parent substance in the biosynthesis of androgens and estrogens is:
A) Cortisol
B) Catecholamines
C) Progesterone
D) Cholesterol
Question 2
As a screening test for Cushing's syndrome, the physician wishes to see whether a patient exhibits normal diurnal rhythm of his cortisol secretion.
At what time should the specimens be drawn for plasma cortisol determination? (Assume a daytime work schedule for the patient.)
A) 6 AM, noon
B) 8 AM, 2 PM
C) 8 AM, 8 PM
D) Noon, 6 PM
E) Noon, midnight