Multiple Choice
The thymus is a ______ organ.
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16. The Endocrine System
Introduction to the Endocrine System
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Which of the following hormones is secreted by the adrenal medulla?
A
Cortisol
B
Epinephrine
C
Insulin
D
Aldosterone
Verified step by step guidance1
Understand the structure and function of the adrenal gland. The adrenal gland is divided into two main parts: the adrenal cortex (outer layer) and the adrenal medulla (inner layer). Each part secretes different hormones.
Recall that the adrenal medulla is responsible for producing catecholamines, which are hormones involved in the fight-or-flight response. The primary hormones secreted by the adrenal medulla are epinephrine (adrenaline) and norepinephrine.
Differentiate between the hormones listed in the question: Cortisol, Insulin, Aldosterone, and Epinephrine. Cortisol and Aldosterone are secreted by the adrenal cortex, while Insulin is secreted by the pancreas.
Identify that Epinephrine is the hormone secreted by the adrenal medulla. It plays a key role in increasing heart rate, blood pressure, and energy supply during stress.
Conclude that the correct answer is Epinephrine, as it is the only hormone in the list secreted by the adrenal medulla.
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