Multiple Choice
Which of the following hormones is released by the posterior lobe of the pituitary gland?
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16. The Endocrine System
The Hypothalamus and Pituitary Gland
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What is the hypothalamic-hypophyseal portal system?
A
A network of blood vessels that connects the hypothalamus to the anterior pituitary gland, allowing for the transport of hormones.
B
A series of nerve fibers that connect the hypothalamus to the posterior pituitary gland, facilitating neural communication.
C
A collection of ducts that transport cerebrospinal fluid between the hypothalamus and the pituitary gland.
D
A group of lymphatic vessels that drain excess fluid from the hypothalamus to the pituitary gland.
Verified step by step guidance1
Identify the key components involved in the hypothalamic-hypophyseal portal system: the hypothalamus and the anterior pituitary gland.
Understand the primary function of the hypothalamic-hypophyseal portal system, which is to transport hormones from the hypothalamus to the anterior pituitary gland.
Recognize that the system is composed of a network of blood vessels, specifically capillaries, that facilitate this hormone transport.
Differentiate between the anterior and posterior pituitary gland connections: the anterior pituitary is connected via the portal blood vessels, while the posterior pituitary is connected via nerve fibers.
Conclude that the hypothalamic-hypophyseal portal system is a network of blood vessels, not nerve fibers, ducts, or lymphatic vessels, emphasizing its role in hormone transport.
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