Question

Identify the incorrect statement among the following

• A. Sella turcica is a bony cavity in which pituitary gland is located.
• B. Parathyroid hormone decreases the $Ca^{+2}$ levels in blood.
• C. Thymosin plays a major role in T-cell differentiation.
• D. The middle zone of adrenal cortex is zona fasciculata.

Hint:

Parathyroid hormone raises blood calcium levels—remember "PTH = Pulls The calcium High".

Answer 1

The Correct Option is B

Parathyroid hormone (PTH) actually increases calcium levels in the blood by stimulating bone resorption, increasing calcium reabsorption in kidneys, and promoting activation of vitamin D for calcium absorption in the intestine.
Thus, statement (2) is incorrect. All other statements are correct: the pituitary sits in the sella turcica, thymosin aids T-cell maturation, and zona fasciculata is the middle adrenal cortex layer.