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Gonadotropin-releasing hormone (GnRH) is synthesized in the hypothalamus and transported to the anterior pituitary. How does...

Gonadotropin-releasing hormone (GnRH) is synthesized in the hypothalamus and transported to the anterior pituitary. How does GnRH reach the anterior pituitary?

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It is transported directly to the anterior pituitary by axons of the hypothalamic-hypophyseal tract.

it is transported by axons to the posterior pituitary and diffuses from there into the anterior pituitary.

It is released into the blood and travels through the systemic circulation before reaching the anterior pituitary.

It is secreted into the hypophyseal portal system and delivered directly to the anterior pituitary.

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