Question

A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?

• A. Pancreas
• B. Parotid
• C. Parathyroid
• D. Thyroid

Answer 1

The correct option is C

Parathyroid

The correct option is C.

Explanation of correct option:

1. In humans, there are four parathyroid glands that are present on the backside of the thyroid gland.
2. The parathyroid glands secrete parathyroid hormone (PTH).
3. PTH regulates the metabolism of calcium and phosphorus in the body.
4. PTH promotes calcium reabsorption and decreases phosphate reabsorption by kidney tubules.

Explanation of incorrect option:

Option A:

1. The pancreas is a heterocrine gland.
2. The exocrine part of the pancreas produces pancreatic juice which helps in digesting foods. The endocrine part of the pancreas secrets pancreatic hormones (insulin, glucagon) that regulate blood glucose levels.

Option B:

1. Parotids are salivary glands.
2. They produce saliva that helps in food digestion.

Option D:

1. The thyroid gland is located in the neck region below the larynx over the trachea.
2. It secretes T₃ and T₄ hormones that play a vital role in iron metabolism.

Final answer: A person is having problems with calcium and phosphorus metabolism in his body. The glands that may not be functioning properly are parathyroid glands.