This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
ACTH secretion is highest during 
Select and explain. 
A. Noon, B. Evening, C. Morning, D. Night
C: Morning
Answer: C: Morning 
Explanation: High levels of ACTH are detected by the adrenal gland receptors which stimulate the secretion of coisol, causing blood levels of coisol to rise. As the coisol levels rise, they sta to slow down the release of coicotrophin-releasing hormone from the hypothalamus and ACTH from the pituitary gland. Ref : Nelson