The hypothalamic-hypophyseal tract,
is the vascular connection between the anterior pituitary and the hypothalamus
is the neural connection between the hypothalamus and the neurohypophysis (posterior pituitary)
conducts aldosterone to the hypophysis
is the site of prolactin synthesis
The Correct Answer is B
a) Is the vascular connection between the anterior pituitary and the hypothalamus: This describes the hypophyseal portal system, not the tract.
b) Is the neural connection between the hypothalamus and the neurohypophysis (posterior pituitary): The hypothalamic-hypophyseal tract consists of axons that transport oxytocin and ADH from the hypothalamus to the posterior pituitary for storage and release.
c) Conducts aldosterone to the hypophysis: Aldosterone is produced by the adrenal cortex and is not transported by this tract.
d) Is the site of prolactin synthesis: Prolactin is synthesized in the anterior pituitary, not in the hypothalamic-hypophyseal tract.
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Related Questions
Correct Answer is D
Explanation
a) Synthesis of thyroglobulin by the follicular cells: This occurs after iodide has been trapped and transported into the follicular lumen.
b) Oxidation of iodide by the follicular cells: This is a later step; iodide must first be trapped before it can be oxidized into iodine.
c) Coupling of T1 and T2: This is one of the final steps in T₃/T₄ synthesis where iodinated tyrosines are joined.
d) lodide trapping by the follicular cells
Iodide trapping is the first step, where follicular cells actively transport iodide from the bloodstream into the thyroid follicle using sodium-iodide symporters.
Correct Answer is D,B,C,A,E
No explanation
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