Multiple Choice
Which statement is true of growth hormone (GH)?
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16. The Endocrine System
The Hypothalamus and Pituitary Gland
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What is the primary function of the hypothalamic-hypophyseal portal system in hormone transport?
A
It transports hormones from the anterior pituitary to the hypothalamus.
B
It allows hormones from the hypothalamus to reach the anterior pituitary directly.
C
It carries hormones from the anterior pituitary to the general circulation.
D
It carries tropic hormones directly from the hypothalamus to the different endocrine glands around the body.
Verified step by step guidance1
Understand the anatomical relationship: The hypothalamic-hypophyseal portal system is a network of blood vessels that connects the hypothalamus to the anterior pituitary gland.
Identify the primary function: The main role of this portal system is to transport hormones directly from the hypothalamus to the anterior pituitary gland.
Clarify the hormone transport process: The hypothalamus releases hormones into the portal system, which then travel directly to the anterior pituitary without entering the general circulation.
Differentiate from other functions: Unlike other systems, this portal system does not transport hormones from the anterior pituitary to the hypothalamus or to the general circulation.
Conclude with the correct function: The hypothalamic-hypophyseal portal system specifically allows hypothalamic hormones to reach the anterior pituitary directly, facilitating the regulation of pituitary hormone secretion.
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