Match the following anterior pituitary hormones with their target organs.

a) Activating vitamin D: This is a direct effect of PTH-PTH stimulates the activation of vitamin D (specifically, conversion to calcitriol) in the kidneys.

b) Increasing calcium reabsorption in the kidney: Also a direct effect-PTH acts on renal tubules to increase reabsorption of calcium.

c) Increasing calcium absorption in the intestines: The increased intestinal calcium absorption is an indirect effect because PTH stimulates the activation of vitamin D, and calcitriol then increases intestinal calcium absorption.

d) Increasing osteoclast activity: This is a direct effect-PTH binds to osteoblasts, which signal osteoclasts to break down bone and release calcium.

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.