Read the two statements and use the following key to answer them. (1) Blood Ca²⁺ levels if parathyroid secretion decreases (2) Blood Ca²⁺ levels if parathyroid hormone secretion increases A) The first item is greater than the second item. B) The first item is less than the second item. C) The first item is equal or nearly equal to the second item.

Question

Quizplus · Accepted Answer

Parathyroid hormone (PTH) increases blood calcium levels. Therefore, if parathyroid secretion decreases, blood calcium levels would decrease (statement 1), and if parathyroid hormone secretion increases, blood calcium levels would increase (statement 2). Thus, blood calcium levels are lower when parathyroid secretion decreases compared to when it increases.

Read the Two Statements and Use the Following Key to Answer