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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a) Hypophysectomized rat treated with thyroxine: Thyroxine suppresses TSH; no goiter forms.
b) Hypophysectomized rat treated with TSH: TSH directly stimulates thyroid tissue growth, leading to goiter even if the pituitary is absent.
c) Thyroidectomized rat treated with PTU: No thyroid = no goiter can form, and PTU inhibits thyroid hormone production, not causing growth in absent tissue.
d) Thyroidectomized rat treated with TSH: Without thyroid tissue, TSH has no target to stimulate.
Correct Answer is D
Explanation
a) calcium
Calcium may be a type of second messenger, but it’s not the overarching mechanism.
b) deactivating ions
This term is vague and not related to hormone signaling.
c) nucleotides
While cAMP (a nucleotide) is a second messenger, not all second messengers are nucleotides, and the option is too narrow.
d) second messengers
Amino acid-based hormones bind to surface receptors and use second messenger systems (like cAMP, IP₃, DAG) to transmit signals inside the cell.
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