Multiple Choice
Which endocrine hormone promotes the breakdown of protein in muscle cells?
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43. Endocrine System
Endocrine System
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The posterior lobe of the pituitary gland is not a true endocrine gland because ________.
A
it is not connected to the hypothalamus by blood vessels
B
it only functions during fetal development
C
it secretes digestive enzymes instead of hormones
D
it does not synthesize its own hormones, but stores and releases hormones produced by the hypothalamus
Verified step by step guidance1
Understand the role of the posterior pituitary gland: The posterior lobe of the pituitary gland, also known as the neurohypophysis, is responsible for storing and releasing hormones but does not produce them itself.
Recognize the connection to the hypothalamus: The hypothalamus synthesizes two key hormones, oxytocin and antidiuretic hormone (ADH), which are transported to the posterior pituitary for storage and later release into the bloodstream.
Differentiate between the anterior and posterior pituitary: The anterior pituitary (adenohypophysis) is a true endocrine gland because it synthesizes and secretes its own hormones, unlike the posterior pituitary.
Clarify why the posterior pituitary is not a true endocrine gland: Since it does not synthesize hormones but only stores and releases those made by the hypothalamus, it does not meet the criteria of a true endocrine gland.
Conclude with the correct reasoning: The posterior pituitary is not a true endocrine gland because it does not synthesize its own hormones, but instead stores and releases hormones produced by the hypothalamus.
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