Tests affected by Diurnal Variation, Posture, Stress

Question 1

Affected by Stress (Increase)

Answer 1

Cortisol, ACTH, Prolactin

Question 2

Lower at Night

Answer 2

ACTH, Plasma Renin activity, Aldosterone, Insulin

Question 3

Higher in the afternoon and the evening

Answer 3

GH, Acid Phosphate

Question 4

Affected by Posture

Answer 4

Plasma Renin activity, Calcium (4% Decrease)