What Hormone Decreases Plasma Calcium Levels

question 14

Multiple Choice

What hormone decreases plasma calcium levels?

• A) calcitonin only
• B) 1,25 -dihydroxy vitamin D_{3 only}
• C) parathyroid hormone only
• D) both calcitonin and 1,25 -dihydroxy vitamin D₃
• E) both calcitonin and parathyroid hormone

---

Definitions:

Achievement Drive

The inner motivation or desire of an individual to accomplish specific goals and excel in tasks.

High Need

A critical or urgent requirement for something that is essential or very important for an individual or entity.

External Locus

The belief that one's life events are primarily controlled by external forces or fate, rather than one's own efforts.

Initiating Structure

A leadership behavior focusing on defining roles, setting goals, and establishing clear guidelines for team or organizational performance.