Question

question 94 (0.5 points)
plasma concentrations of tsh, acth, fsh, and lh are measured to be below normal, while gh and prolactin are normal.
which explanation best accounts for this hormone pattern?
basophils in the posterior lobe of the pituiatary gland are not functioning properly.
basophils in the anterior lobe of the pituiatary gland are not functioning properly.
acidophils in the posterior lobe of the pituiatary gland are not functioning properly.
acidophils in the anterior lobe of the pituiatary gland are not functioning properly.

Explanation:

1. First, recall pituitary gland anatomy and cell types: The anterior pituitary has basophils (secrete TSH, ACTH, FSH, LH) and acidophils (secrete GH, prolactin). The posterior pituitary doesn't synthesize these hormones (stores/releases oxytocin, ADH).
2. Analyze hormone pattern: TSH, ACTH, FSH, LH (basophil - secreted) are low; GH, prolactin (acidophil - secreted) are normal. So basophils in anterior pituitary (where these hormones are produced) are malfunctioning.
3. Eliminate other options: Posterior pituitary doesn't produce these hormones (so options with posterior are wrong). Acidophils secrete GH/prolactin (normal here, so acidophil options wrong).

Answer:

B. Basophils in the anterior lobe of the pituitary gland are not functioning properly.