Question

The hormone, increases the blood calcium level and decreases the blood calcium level.

• A. calcitonin
• B. parathormone
• C. thyroxine
• D. melatonin
• E. melanin

Answer 1

Answer: (A), (B)

The correct options are
A calcitonin
B parathormone

Parathormone is secreted by the parathyroid gland. It increases the blood calcium levels by increasing the reabsorption of calcium from kidneys and decreasing calcium deposition on bones.
Calcitonin, secreted by thyroid gland decreases the blood calcium level by increasing bone absorption of calcium.
They work together to regulate the blood calcium levels.