Question

1. Excessive parathyroid hormone (hyperparathyroidism) may lead to the following:

a. Hypercalcemia

b. Hypocalcemia

c. Hypophosphatemia

d. A and C

e. B and C

2. Lack of parathyroid hormone secretion (hypoparathyroidism) may l ead to the following:

a. Hypercalcemia

b. Hypocalcemia

c. Hypophosphatemia

d. A and C

e. B and C

Answer 1

1. Parathyroid gland secretes a hormone 'Parathormone' which increases blood calcium levels by stimulating the calcium release from bones. It also leads to regulate serum phosphate levels by inhibiting phosphorus reabsorption by kidneys. Increased secretion or hyperparathyroidism leads to hypercalcemia (High calcium concentration in blood) and hypophosphatemia (low serum phosphate level due to reduced phosphate reabsorption).

Therefore option d is correct.

2. Lack of PTH secretion leads to low levels of calcium in blood (Hypocalcemia).
therefore option B is correct