Researchers first discovered the existence of hormones by studying secretions from the ________.
A) adrenal glands
B) pancreas
C) gonads
D) thymus gland
E) pineal gland

Name: Researchers first discovered the existence of hormones by studying secretions from the ________. A) adrenal glands B) pancreas C) gonads D) thymus gland E) pineal gland
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Question

Researchers first discovered the existence of hormones by studying secretions from the ________.  
A) adrenal glands
B) pancreas
C) gonads
D) thymus gland
E) pineal gland

Quizplus · Accepted Answer

Researchers first discovered the existence of hormones by studying secretions from the pancreas, specifically through the work on insulin.

Researchers First Discovered the Existence of Hormones by Studying Secretions