GED Science TestLife ScienceMedium
A client is experiencing persistent fatigue, muscle weakness, and frequent cramps. A blood test reveals low levels of calcium and phosphorus. Which of the following glands is most likely malfunctioning, leading to these symptoms?
- APancreas
- BAdrenal gland
- CThyroid gland
- DParathyroid glands
Show answer & explanationAnswer & explanation
Correct answer: D. Parathyroid glands
The parathyroid glands produce parathyroid hormone (PTH), which is the primary regulator of calcium and phosphate levels in the blood. Low calcium and phosphorus suggest a problem with PTH regulation.
Why the other options are wrong
- A. The pancreas primarily regulates blood sugar levels through insulin and glucagon.
- B. The adrenal gland produces hormones like adrenaline and cortisol, involved in stress response and metabolism, not calcium/phosphorus balance.
- C. The thyroid gland primarily regulates metabolism and growth, not directly calcium and phosphorus levels.
Parathyroid Gland Function
The parathyroid glands are small endocrine glands located in the neck that produce parathyroid hormone (PTH), which plays a crucial role in regulating calcium and phosphate homeostasis in the blood and bones.
- Located behind the thyroid gland.
- PTH increases blood calcium by acting on bones, kidneys, and intestines.
- PTH decreases blood phosphate levels.
Memory trick: Para-Calcium's Partner: PTH's Power Play.