Answer :
Sure! Here are the answers to the questions:
20. Which hormones are produced by the adrenal medulla?
A. Catecholamines
21. Which structure integrates the activities of the endocrine system?
B. Hypothalamus
22. What effect does insulin have?
C. Lowers blood sugar level
23. Which structure produces epinephrine and norepinephrine?
B. Adrenal medulla
24. Which cells produce insulin?
C. Beta cells
25. What controls the blood glucose level, the action of?
C. Insulin and glucagon
26. Which of the following secretes growth hormone?
B. Anterior lobe of the pituitary gland