A Patient Who Has Recently Undergone Surgery to Remove Tumors

Multiple Choice

A patient who has recently undergone surgery to remove tumors from his thyroid gland suddenly begins to tremble violently from head to toe because his nerves have become too excitable. Why?

A) Too much thyroid tissue was removed, and without oxytocin, blood calcium levels fell too low.
B) The parathyroid glands were removed, and without parathyroid hormone (PTH) , blood calcium levels rose too high.
C) The parathyroid glands were removed, and without parathyroid hormone (PTH) , blood calcium levels fell too low.
D) Too much thyroid tissue was removed, and without calcitonin, blood calcium levels fell too low.
E) The hypothalamus was removed, and without it releasing hormones, blood calcium levels fell too low.